WO2019098662A1

WO2019098662A1 - Device and method for determining radio resource in wireless communication system

Info

Publication number: WO2019098662A1
Application number: PCT/KR2018/013871
Authority: WO
Inventors: 민병윤; 강현정; 목영중
Original assignee: 삼성전자 주식회사
Priority date: 2017-11-15
Filing date: 2018-11-14
Publication date: 2019-05-23
Also published as: US20230007629A1

Abstract

Disclosed is a 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system such as long term evolution (LTE). An operation method of a terminal in a wireless communication system comprises the steps of: receiving, from a base station, a message including information on a resource pool for vehicle communication and information for selecting a resource from the resource pool; determining candidate resources in the resource pool on the basis of the information for selecting the resource; and transmitting data by using at least one resource among the candidate resources.

Description

Apparatus and method for determining radio resources in a wireless communication system

BACKGROUND OF THE INVENTION [0002] This disclosure relates generally to wireless communication systems, and more specifically to an apparatus and method for determining radio resources in a wireless communication system.

Efforts are underway to develop improved 5G (5 ^th generation) communication systems or pre-5G communication systems to meet the increasing demand for wireless data traffic after commercialization of 4G (4 ^th generation) communication systems. For this reason, a 5G communication system or a pre-5G communication system is referred to as a 4G network (Beyond 4G Network) communication system or a LTE (Long Term Evolution) system (Post LTE) system.

To achieve a high data rate, 5G communication systems are being considered for implementation in very high frequency (mmWave) bands (e.g., 60 gigahertz (60GHz) bands). In the 5G communication system, beamforming, massive MIMO, full-dimensional MIMO, and FD-MIMO are used in order to mitigate the path loss of the radio wave in the very high frequency band and to increase the propagation distance of the radio wave. ), Array antennas, analog beam-forming, and large scale antenna technologies are being discussed.

In addition, in order to improve the network of the system, the 5G communication system has developed an advanced small cell, an advanced small cell, a cloud radio access network (cloud RAN), an ultra-dense network, (D2D), a wireless backhaul, a moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Have been developed.

In addition, in the 5G system, the Advanced Coding Modulation (ACM) scheme, Hybrid Frequency Shift Keying and Quadrature Amplitude Modulation (FQAM) and Sliding Window Superposition Coding (SWSC), and the Advanced Connection Technology (FBMC) ), Non-Orthogonal Multiple Access (NOMA), and Sparse Code Multiple Access (SCMA).

In 5G systems, schemes for determining various types of radio resources are discussed. For example, a radio resource determination method for a vehicle to everything (V2X) terminal has been proposed. Furthermore, various discussions are under way to determine radio resources more efficiently.

Based on the above discussion, the disclosure provides a method for a terminal to select radio resources in accordance with a common resource pool operation between terminals in a vehicular communication system, thereby providing a vehicle communication that achieves high reliability and low delay requirements An apparatus and method for supporting service and data transmission.

According to various embodiments of the present disclosure, a method of operating a terminal in a wireless communication system includes receiving a message from a base station, the information including information about a resource pool for vehicle communication and information for selecting resources from the resource pool Determining candidate resources in the resource pool based on information for selecting the resource, and transmitting data using at least one resource among the candidate resources.

According to various embodiments of the present disclosure, a device of a terminal in a wireless communication system includes a transmitting and receiving unit and at least one processor functionally coupled to the transmitting and receiving unit. Wherein the transceiver receives a message including information on a resource pool for vehicle communication from the base station and information for selecting a resource from the resource pool, and the at least one processor is operable to receive information Determines candidate resources in the resource pool, and the transceiver transmits data using at least one resource among the candidate resources.

According to various embodiments of the present disclosure, a method of operating a base station in a wireless communication system includes transmitting a message to the terminal, the information including information about a resource pool for vehicle communication and information for selecting resources from the resource pool Wherein candidate resources are determined in the resource pool based on information for selecting the resource by the terminal and data is selected by the terminal using at least one resource among the candidate resources, .

According to various embodiments of the present disclosure, a device in a base station in a wireless communication system includes a transceiver and at least one processor operatively coupled to the transceiver. The transceiver transmits a message including information on a resource pool for vehicle communication and information for selecting a resource in the resource pool to the terminal, and the terminal transmits information for selecting the resource Candidate resources are determined in the resource pool, and data is transmitted by the terminal using at least one resource among the candidate resources.

The apparatus and method according to various embodiments of the present disclosure can achieve reliability and low delay requirements in vehicle communication by preventing resource selection conflicts that may occur when operating a public radio resource pool in a vehicle communication system, Thereby achieving efficient resource management of the system.

The effects obtainable from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below will be.

1 illustrates a wireless communication system in accordance with various embodiments of the present disclosure.

2 illustrates a configuration of a base station in a wireless communication system according to various embodiments of the present disclosure.

3 illustrates a configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure.

4A to 4C illustrate the configuration of a communication unit in a wireless communication system according to various embodiments of the present disclosure.

FIG. 5 illustrates a situation in which a public resource pool is used to dynamically use a V2X (vehicle to everything) packet to transmit in accordance with various embodiments of the present disclosure.

FIG. 6 illustrates a signaling exchange for additional settings in which a base station limits the probResourceKeep probability threshold to a mode 4 terminal when operating a public resource pool in accordance with various embodiments of the present disclosure.

Figure 7 shows a flow diagram of a mode 4 terminal when the probing resource probing threshold set by the base station in accordance with various embodiments of the present disclosure is set to zero.

FIG. 8 shows a flow diagram of a mode 4 terminal that determines whether a mode 4 terminal according to various embodiments of the present disclosure searches for and maintains additional resources in a common resource pool.

FIG. 9 illustrates an exchange for establishing a period for a mode 3 UE to search for a common resource pool and report to a base station, and report a search result, when a common resource pool according to various embodiments of the present disclosure is formed.

FIG. 10 is a flowchart illustrating a method for setting a maximum value T2 of a resource selection window when a mode 4 UE selects a resource after a UE-autonomous search in a common resource pool when a common resource pool according to various embodiments of the present disclosure is formed. Signal exchange.

FIG. 11 is a flowchart illustrating a signal exchange for setting a number of hybrid automatic repeat request (HARQ) retransmissions when a mode 4 UE selects resources after a UE-autonomous search in a common resource pool according to various embodiments of the present disclosure; Lt; / RTI >

12 illustrates a new-effect exchange for setting a transmission parameter for a sidelink transmission in a public resource pool when a mode 4 terminal has a public resource pool formed according to various embodiments of the present disclosure.

FIG. 13 illustrates an example of operation in which all resources in a public resource pool are used together in mode 3 and mode 4 according to various embodiments of the present disclosure.

FIG. 14 illustrates an example in which a PSCCH (physical sidelink control channel) resource and a PSSCH (physical sidelink shared channel) resource are adjacent to each other according to various embodiments of the present disclosure.

15 illustrates an example of a case where PSCCH resources and PSSCH resources are not adjacent in accordance with various embodiments of the present disclosure.

16 illustrates an example of operation in which only some of the resources in the public resource pool are used together in mode 3 and mode 4 according to various embodiments of the present disclosure.

17 illustrates an example of a case where PSCCH resources and PSSCH resources are adjacent in accordance with various embodiments of the present disclosure.

18 illustrates an example of a case where PSCCH resources and PSSCH resources are not adjacent, according to various embodiments of the present disclosure.

19 illustrates signaling for use of a shared resource pool in accordance with various embodiments of the present disclosure.

20 shows a flow diagram of a base station in accordance with various embodiments of the present disclosure.

Figure 21 shows another flow diagram of a base station in accordance with various embodiments of the present disclosure.

Figure 22 illustrates signaling for directing the use of shared resources in accordance with various embodiments of the present disclosure.

Figure 23 shows information about resources to perform CBR measurements in accordance with various embodiments of the present disclosure.

24 illustrates signaling for resource measurement and reporting for a resource pool for resource sharing in accordance with various embodiments of the present disclosure.

25A and 25B illustrate examples of sharing a preconfigured resource pool in accordance with various embodiments of the present disclosure.

26 shows a flowchart of a base station for processing resource status reporting required for shared resource pool operation in accordance with various embodiments of the present disclosure;

The terms used in this disclosure are used only to describe certain embodiments and may not be intended to limit the scope of other embodiments. The singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. The general predefined terms used in this disclosure may be interpreted as having the same or similar meaning as the contextual meanings of the related art and, unless explicitly defined in the present disclosure, include ideally or in an excessively formal sense . In some cases, the terms defined in this disclosure can not be construed to exclude embodiments of the present disclosure.

In the various embodiments of the present disclosure described below, a hardware approach is illustrated by way of example. However, the various embodiments of the present disclosure do not exclude a software-based approach, since various embodiments of the present disclosure include techniques that use both hardware and software.

The present disclosure relates to an apparatus and method for determining radio resources in a wireless communication system. More specifically, the present disclosure relates to a method and apparatus for preventing resource selection conflict between UEs based on a method for selecting a radio resource for common resource pool operation between V2X (vehicle to everything) terminals in a wireless communication system, Explain techniques for success. The resource selection may correspond to a direct communication interface between the mode 3 terminal and the mode 4 terminal.

The terms used to refer to signals used in the following description, the term channel, the term control information, the term network entity, the term component element, etc., . Accordingly, the present disclosure is not limited to the following terms, and other terms having equivalent technical meanings can be used.

In addition, the present disclosure describes various embodiments using terms used in some communication standards (e.g., 3GPP (3 ^rd Generation Partnership Project)), but this is merely illustrative. The various embodiments of the present disclosure can be easily modified and applied in other communication systems as well.

1 illustrates a wireless communication system in accordance with various embodiments of the present disclosure. 1 illustrates a base station 110, a terminal 120, and a terminal 130 as a part of nodes using a wireless channel in a wireless communication system. Although FIG. 1 shows only one base station, it may further include another base station which is the same as or similar to the base station 110. 1 illustrates only two terminals, but may further include another terminal that is the same as or similar to the terminal 120 and the terminal 130. [

The base station 110 is a network infrastructure that provides wireless access to the terminals 120, The base station 110 has a coverage defined by a certain geographic area based on the distance over which the signal can be transmitted. The base station 110 includes an 'access point (AP)', 'eNodeB (eNodeB)', '5G node', 'wireless point', ' A transmission / reception point (TRP) ', or other terms having equivalent technical meanings.

Each of the terminal 120 and the terminal 130 is a device used by a user and communicates with the base station 110 through a wireless channel. In some cases, at least one of terminal 120 and terminal 130 may be operated without user involvement. That is, at least one of the terminal 120 and the terminal 130 is an apparatus for performing machine type communication (MTC), and may not be carried by a user. Each of the terminal 120 and the terminal 130 may include a terminal, a user equipment (UE), a mobile station, a subscriber station, a remote terminal, Wireless terminal, '' user device, 'or any other terminology having equivalent technical meanings.

The base station 110, the terminal 120, and the terminal 130 can transmit and receive wireless signals in the millimeter wave band (e.g., 28 GHz, 30 GHz, 38 GHz, and 60 GHz). At this time, in order to improve the channel gain, the base station 110, the terminal 120, and the terminal 130 may perform beamforming. Here, beamforming may include transmit beamforming and receive beamforming. That is, the base station 110, the terminal 120, and the terminal 130 may assign a directivity to a transmission signal or a reception signal. To this end, the base station 110 and the

terminals

120, 130 may select the serving

beams

112, 113, 121, 131 through a beam search or beam management procedure. After the serving

beams

112, 113, 121, and 131 are selected, communication may then be performed through resources that are in quasi co-located (QCL) relationship with the resources that transmitted the serving

beams

112, 113, 121,

If the large-scale characteristics of the channel carrying the symbol on the first antenna port can be inferred from the channel carrying the symbol on the second antenna port, then the first antenna port and the second antenna port are in a QCL relationship Can be evaluated. For example, a wide range of properties may be used to estimate delay spread, Doppler spread, Doppler shift, average gain, average delay, spatial receiver parameter, Or the like.

2 illustrates a configuration of a base station in a wireless communication system according to various embodiments of the present disclosure. The configuration illustrated in FIG. 2 can be understood as a configuration of the base station 110. FIG. Hereinafter, terms such as "part" and "group" refer to a unit for processing at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software have.

Referring to FIG. 2, the base station includes a wireless communication unit 210, a backhaul communication unit 220, a storage unit 230, and a control unit 240.

The wireless communication unit 210 performs functions for transmitting and receiving signals through a wireless channel. For example, the wireless communication unit 210 performs conversion between a baseband signal and a bit string according to a physical layer specification of the system. For example, at the time of data transmission, the wireless communication unit 210 generates complex symbols by encoding and modulating a transmission bit stream. Also, upon receiving the data, the wireless communication unit 210 demodulates and decodes the baseband signal to recover the received bit stream.

Also, the wireless communication unit 210 up-converts the baseband signal to an RF (radio frequency) band signal, transmits the signal through the antenna, and downconverts the RF band signal received through the antenna to a baseband signal. To this end, the wireless communication unit 210 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog converter (DAC), and an analog to digital converter (ADC). In addition, the wireless communication unit 210 may include a plurality of transmission / reception paths. Further, the wireless communication unit 210 may include at least one antenna array composed of a plurality of antenna elements.

In terms of hardware, the wireless communication unit 210 may be composed of a digital unit and an analog unit, and the analog unit may include a plurality of subunits according to operating power, an operating frequency, . The digital unit may be implemented with at least one processor (e.g., a digital signal processor (DSP)).

The wireless communication unit 210 transmits and receives signals as described above. Accordingly, all or a part of the wireless communication unit 210 may be referred to as a 'transmitter', a 'receiver', or a 'transceiver'. In the following description, the transmission and reception performed through the wireless channel are used to mean that the processing as described above is performed by the wireless communication unit 210. [

The backhaul communication unit 220 provides an interface for performing communication with other nodes in the network. That is, the backhaul communication unit 220 converts a bit string transmitted from the base station to another node, for example, another access node, another base station, an upper node, a core network, etc., into a physical signal, .

The storage unit 230 stores data such as a basic program, an application program, and setting information for operation of the base station. The storage unit 230 may be composed of a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. The storage unit 230 provides the stored data at the request of the control unit 240.

The control unit 240 controls the overall operations of the base station. For example, the control unit 240 transmits and receives signals through the wireless communication unit 210 or through the backhaul communication unit 220. [ In addition, the control unit 240 records and reads data in the storage unit 230. [ The control unit 240 can perform functions of a protocol stack required by the communication standard. According to another embodiment, the protocol stack may be included in the wireless communication unit 210. To this end, the control unit 240 may include at least one processor.

According to various embodiments, the control unit 240 may transmit radio resource control (RRC) configuration information to the terminal 110. For example, the control unit 240 may control the base station to perform operations according to various embodiments described below.

3 illustrates a configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure. The configuration illustrated in FIG. 3 can be understood as a configuration of the terminal 120 or the terminal 130. Hereinafter, terms such as "part" and "group" refer to a unit for processing at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software have.

Referring to FIG. 3, the terminal includes a communication unit 310, a storage unit 320, and a control unit 330.

The communication unit 310 performs functions for transmitting and receiving signals through a wireless channel. For example, the communication unit 310 performs conversion between a baseband signal and a bit string according to a physical layer specification of the system. For example, at the time of data transmission, the communication unit 310 generates complex symbols by encoding and modulating a transmission bit stream. Also, upon receiving the data, the communication unit 310 demodulates and decodes the baseband signal to recover the received bit stream. In addition, the communication unit 310 up-converts the baseband signal to an RF band signal, transmits the RF band signal through the antenna, and down converts the RF band signal received through the antenna to a baseband signal. For example, the communication unit 310 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like.

In addition, the communication unit 310 may include a plurality of transmission / reception paths. Further, the communication unit 310 may include at least one antenna array composed of a plurality of antenna elements. In terms of hardware, the communication unit 310 may be composed of digital circuitry and analog circuitry (e.g., RFIC (radio frequency integrated circuit)). Here, the digital circuit and the analog circuit can be implemented in one package. In addition, the communication unit 310 may include a plurality of RF chains. Further, the communication unit 310 can perform beamforming.

In addition, the communication unit 310 may include different communication modules for processing signals of different frequency bands. Further, the communication unit 310 may include a plurality of communication modules to support a plurality of different wireless connection technologies. For example, different wireless access technologies may include Bluetooth low energy (BLE), Wireless Fidelity (Wi-Fi), WiGig (WiFi Gigabyte), cellular networks such as Long Term Evolution In addition, different frequency bands may include a super high frequency (SHF) band (e.g., 2.5 GHz, 5 GHz) and a millimeter wave (e.g., 60 GHz) band.

The communication unit 310 transmits and receives signals as described above. Accordingly, all or a part of the communication unit 310 may be referred to as a 'transmission unit', a 'reception unit', or a 'transmission / reception unit'. In the following description, the transmission and reception performed through the wireless channel are used to mean that the processing as described above is performed by the communication unit 310. [

The storage unit 320 stores data such as a basic program, an application program, and setting information for operation of the terminal. The storage unit 320 may be composed of a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. The storage unit 320 provides the stored data at the request of the control unit 330.

The controller 330 controls overall operations of the terminal. For example, the control unit 330 transmits and receives signals through the communication unit 310. In addition, the controller 330 writes data to the storage unit 320 and reads the data. The control unit 330 can perform the functions of the protocol stack required by the communication standard. To this end, the control unit 330 may include at least one processor or a microprocessor, or may be part of a processor. Also, a part of the communication unit 310 and the control unit 330 may be referred to as a communication processor (CP).

According to various embodiments, when the terminal 120 does not belong to a common resource pool with another terminal, the controller 330 transmits the first data using the first side link grant, The second side link grant may be determined based on the RRC configuration information received from the base station 110 and the second data may be transmitted using the second side link grant. For example, the control unit 330 may control the terminal to perform operations according to various embodiments described below.

4A to 4C illustrate the configuration of a communication unit in a wireless communication system according to various embodiments of the present disclosure. 4A to 4C show examples of the detailed configuration of the wireless communication unit 210 of FIG. 2 or the communication unit 310 of FIG. Specifically, FIGS. 4A to 4C illustrate components for performing beamforming as part of the wireless communication unit 210 of FIG. 2 or the communication unit 310 of FIG.

4A, the wireless communication unit 210 or the communication unit 310 includes a coding and modulation unit 402, a digital beamforming unit 404, a plurality of transmission paths 406-1 to 406-N, and an analog beamforming unit 408. [

The encoding and modulation unit 402 performs channel encoding. For channel encoding, at least one of a low density parity check (LDPC) code, a convolution code, and a polar code may be used. The encoding and modulation unit 402 generates modulation symbols by performing contellation mapping.

Digital beamforming section 404 performs beamforming on digital signals (e.g., modulation symbols). To this end, digital beamforming section 404 multiplies the modulation symbols with the beamforming weights. Here, the beamforming weights are used to change the size and phase of the signal, and may be referred to as a 'precoding matrix', a 'precoder', or the like. Digital beamforming section 404 outputs the digital beamformed modulation symbols to multiple transmission paths 406-1 through 406-N. At this time, according to a multiple input multiple output (MIMO) transmission scheme, the modulation symbols may be multiplexed or the same modulation symbols may be provided to a plurality of transmission paths 406-1 through 406-N.

The plurality of transmission paths 406-1 through 406-N convert the digital beamformed digital signals into analog signals. To this end, each of the plurality of transmission paths 406-1 through 406-N may include an inverse fast fourier transform (IFFT) operation unit, a cyclic prefix (CP) insertion unit, a DAC, and an up conversion unit. The CP inserter is for an orthogonal frequency division multiplexing (OFDM) scheme, and can be excluded when another physical layer scheme (e.g., FBMC (filter bank multi-carrier)) is applied. That is, the plurality of transmission paths 406-1 through 406-N provide an independent signal processing process for a plurality of streams generated through digital beamforming. However, depending on the implementation, some of the components of the multiple transmission paths 406-1 through 406-N may be used in common.

The analog beamforming unit 408 performs beamforming on the analog signal. To this end, the digital beamforming section 404 multiplies the analog signals with the beamforming weights. Here, the beamforming weights are used to change the magnitude and phase of the signal. Specifically, depending on the number of transmission paths 406-1 through 406-N and the connection structure between the antennas, the analog beamforming section 408 may be configured as shown in FIG. 4B or FIG. 4C.

Referring to FIG. 4B, signals input to the analog beamforming unit 408 are transmitted through antennas through phase / size conversion, amplification, and the like. At this time, the signals of each path are transmitted through different antenna sets, i.e., antenna arrays. Referring to the processing of the signal input through the first path, the signal is converted into a signal sequence having different or the same phase / size by the phase / size conversion units 412-1-1 to 412-1-M, 1-1 to 414-1-M, and then transmitted through the antennas.

Referring to FIG. 4C, the signals input to the analog beamforming unit 408 are transmitted through antennas through phase / size conversion, amplification, and the like. At this time, the signals of the respective paths are transmitted through the same antenna set, i.e., the antenna array. Referring to the processing of the signal input through the first path, the signal is converted into a signal sequence having different or the same phase / size by the phase / size conversion units 412-1-1 to 412-1-M, 1-1 to 414-1-M. Then, the amplified signals are summed by the summers 416-1-1 to 416-1-M on the basis of the antenna elements so as to be transmitted through one antenna array, and then transmitted through the antennas.

FIG. 4B shows an example in which an independent antenna array for each transmission path is used, and FIG. 4C shows an example in which transmission paths share one antenna array. However, according to another embodiment, some transmission paths may use an independent antenna array, and the remaining transmission paths may share an antenna array. Furthermore, according to another embodiment, a structure that can adaptively change according to the situation can be used by applying a switchable structure between transmission paths and antenna arrays.

FIG. 5 illustrates a situation in which a public resource pool used to transmit V2X packets according to various embodiments of the present disclosure is dynamically operated.

Referring to FIG. 5, the object of resource sharing used when transmitting the V2X packet considered in the present disclosure may be a scheduled resource or a terminal-autonomous selection resource of a sidelink. The scheduled resource is a resource for the BS to directly schedule resources to be used for V2X communication to the UE. The UE-autonomous selection resource is a resource that the UE autonomously selects and uses directly in the resource pool allocated for the V2X communication purpose.

The embodiment of the present invention uses two modes, i.e., mode 3 (resource usage mode scheduled by the base station) or mode 4 (terminal-autonomous selection resource use, Mode) to be operated in a common resource pool. According to various embodiments of the present disclosure, the public resource pool used when transmitting a V2X packet can be used together in Mode 3 and Mode 4, as all resources in the public resource pool, as shown in FIG. 1- (1) (2), only a part of resources in the public resource pool can be used together in the mode 3 and the mode 4, and independent resource pools exist respectively, or resources (resources) originally operated by the mode 3 and the mode 4, (Left arrow direction) allowing the resource pool allocated to mode 4 to be shared dynamically (right arrow direction), allowing the resource pool allocated to mode 3 to be granted to mode 4 Pool.

As an embodiment of the present disclosure, when a resource pool of a mode 3 V2X terminal is originally shared with a mode 4 V2X terminal, a mode 4 terminal minimizes disturbance of V2X communication in mode 3, have. For another example, if the resource pool of the original mode 4 V2X terminal is to be shared with the mode 3 V2X terminal, the mode 3 terminal can minimize the interference with the mode 4 V2X communication and use the resources. The common resource pool operation aims at efficient utilization of the frequency band for V2X and avoids collision when selecting a radio resource and can be utilized universally for a service for satisfying the transmission delay requirement of mode 3 and mode 4 V2X terminals .

Release 14 Long Term Evolution (LTE) - A terminal operating in Mode 4 in V2X autonomously detects its resource pool and competitively selects idle resources based on the search results -based resource selection).

Prior to the transmission resource re-selection process of the Mode 4 UE in Release 14, the MAC medium access control entity of the UE multiplies the restrictResourceReservationPeriod value set by the RRC by 100, If the set period value is more than 100ms, select any integer in the [5, 15] interval. If the set period value is 50ms, select any integer in the [10, 30] In case of 20ms, select any integer among [25,75] and set it to SL_RESOURCE_RESELECTION_COUNTER value.

The set SL_RESOURCE_RESELECTION_COUNTER value is decremented by 1 each time the MAC PDU (protocol data unit) to be transmitted is transmitted. When the SL_RESOURCE_RESELECTION_COUNTER value reaches 0, the mode 4 UE transmits a grant Whether to continue to utilize the grant or to initialize and reselect can be determined by the probResourceKeep defined in the SL-CommTxPoolSensingConfig of the RRC sidelink information element. (Eg, Release 14 RRC standards such as SL-CommTxPoolSensingConfig information element)

The probeResourceKeep value is set as a threshold value as RRC configuration information by the base station implementation, and the mode 4 terminal operates as follows. Mode 4 When the terminal selects any value in the [0,1] interval, it is smaller than the value of the probeResourceKeep. If the previously set interval value is more than 100ms, it selects any integer in the interval [5,15] If the value is 50ms, select any integer from [10,30], or if the set period is 20ms, select any integer from [25,75] and set it to SL_RESOURCE_RESELECTION_COUNTER value. Thereby performing side link transmission.

On the other hand, if the mode 4 terminal selects an arbitrary value in the [0, 1] interval, if the selected value is greater than the probResourceKeep value, the previously set side link grant is canceled and the resource pool to which the terminal 4 belongs is autonomously Based on the search results, contention-based resource selection can be used for the idle resources. At this time, the MAC entity of the UE sets a resource reservation interval as a value obtained by multiplying the value of restrictResourceReservationPeriod set by the RRC by 100, and if the set period value is 100 ms or more, the random integer of [5, 15] If the set period value is 50ms, select an arbitrary integer from [10,30]. If the set period value is 20ms, select any integer among the [25,75] interval and set it to SL_RESOURCE_RESELECTION_COUNTER value .

In addition, when the number of hybrid automatic repeat request (HARQ) retransmissions of a terminal operating in mode 4 in LTE-V2X of Release 14 is set to 1, any one transmission opportunity among available frequency-time resources is selected, A radio resource set reflecting the resource reservation interval and the number of transmissions may be configured based on the resource. The number of retransmissions is determined based on the transmission parameters of the side link PSSCH (physical sidelink shared channel) in the RRC, and the mode 4 terminal permits only initial transmission or retransmission once. If set to " both " (Eg Release 14 RRC standard such as SL-PSSCH-TxConfigList information element).

FIG. 6 illustrates a signal exchange for further setup in which the base station limits the probResourceKeep probability threshold to mode 4 terminals when operating a public resource pool according to various embodiments of the present disclosure. 6 illustrates a signal exchange between the base station 110 and the terminal 120. In FIG.

Referring to FIG. 6, in step 601, a base station (e. G., Terrestrial radio access network (e-UTRAN) (For example, SL-CommTxSharedPoolList), or by using an instruction message (eg, SL-ResourcePoolSharingIndicator) indicating whether or not each resource pool is shared. The base station can provide the transmission resource pool information to the mode 3 terminal and the mode 4 terminal using the RRCConnectionReconfiguration message or the SIB (system information block) 21 or another RRC message.

In step 603, if the mode 4 UE belongs to the common resource pool, the base station can provide an additional setting for limiting the probResourceKeep value to 0 using a direct RRCConnectionReconfiguration message, an SIB 21 message, or another RRC message.

- SL-CommTxPoolSensingConfig embodiment for above probResourceKeep operation

• probResourceKeep-r15 = {0} (if probResourceKeep-r15 is set, the existing probResourceKeep-r14 is ignored)

In another embodiment, when the probResourceKeep value is set, a condition for considering the common resource pool operation condition may be added as follows.

- SL-CommTxPoolSensingConfig embodiment for above probResourceKeep operation

• probResourceKeep-r14 probeResourceKeep-r15 OPTIONAL - Cond SharedPool (the configuration for the probResourceKeep value can be selected in the base station RRC depending on whether the public resource pool is operational)

In some embodiments, if the data to be transmitted by the mode 4 terminal is still present and the side link transmission is completed by the number of transmissions by the SL_RESOURCE_RESELECTION_COUNTER as a pre-occupied resource, if the probResourceKeep value received from the base station is 0, The probResourceKeep value managed by the UE is set to 0 and the mode 4 UE located in the buffer searches for a common resource pool usage status to select a resource for data to be transmitted. The operation of the mode 4 UE can be applied to a case where the mode 4 UE uses a pre-established public resource pool or a mode 4 independent resource pool as a shared resource pool. In another embodiment, when the probResourceKeep value for the common resource pool is already set to 0, the data to be transmitted by the mode 4 UE exists and the side link transmission is performed by the SL_RESOURCE_RESELECTION_COUNTER The mode 4 UE can search for the shared resource pool usage status in order to select a resource for data to be transmitted that exists in the buffer. The additional setting of the base station to limit the probability retention probing threshold value of the mode 4 terminal to 0 is compared with the operation of maintaining the resource without searching the resource utilization status of the common resource pool, To avoid a collision with the mode 3 terminal.

Figure 7 shows a flow diagram of a mode 4 terminal when the probing resource probing threshold set by the base station in accordance with various embodiments of the present disclosure is set to zero. 7 illustrates an operation method of the terminal 120. FIG.

Referring to FIG. 7, in step 701, the mode 4 terminal performs side link transmission using the side link grant. In step 703, the mode 4 terminal determines whether the mode 4 terminal belongs to the common resource pool.

If the mode 4 UE does not belong to the public resource pool previously formed by the RRC configuration (i.e., belongs to the mode 4 independent resource pool), the mode 4 UE performs the Release 14-based mode 4 operation in step 705 .

If the mode 4 UE belongs to the common resource pool, the mode 4 UE checks in step 707 whether there is data to be transmitted to the buffer. If there is no data to be transmitted to the buffer, the mode 4 terminal may release the side link grant formed in the MAC layer and the physical layer in step 709. [

If there is data to be transmitted to the buffer, the mode 4 UE checks in step 711 whether the SL_RESOURCE_RESELECTION_COUNTER value has reached zero. If the SL_RESOURCE_RESELECTION_COUNTER value reaches 0, the mode 4 UE searches and reselects the common resource pool without maintaining the resources used by the probResourceKeep = 0 condition set by the RRC configuration in step 713, Setting. If the SL_RESOURCE_RESELECTION_COUNTER value has not reached 0, the mode 4 terminal maintains the existing side link grant and performs the side link transmission in step 715. In the above embodiment, when the mode 4 UE belongs to the common resource pool, the condition of probResourceKeep = 0 received from the base station can be applied to the RRC of the UE.

According to various embodiments of the present disclosure, each of the steps of FIG. 7 above may be performed in a MAC entity, except for the step of setting the RRC probResourceKeep value.

FIG. 8 shows a flow diagram of a mode 4 terminal that determines whether a mode 4 terminal according to various embodiments of the present disclosure searches for and maintains additional resources in a common resource pool. 8 illustrates an operation method of the terminal 120. FIG.

Referring to FIG. 8, in step 801, a mode 4 terminal performs side link transmission using a side link grant. In step 803, the mode 4 UE checks whether the mode 4 UE belongs to the common resource pool formed by the RRC configuration in advance.

If the mode 4 UE does not belong to the common resource pool (i.e., belongs to the mode 4 independent resource pool), the mode 4 UE performs the Release 14-based Mode 4 operation in step 805.

If the mode 4 UE belongs to the common resource pool, the mode 4 UE checks in step 807 whether there is data to be transmitted to the buffer. If there is no data to be transmitted to the buffer, the mode 4 terminal may release the side link grant formed in the MAC layer and the physical layer in step 809. [

If there is data to be transmitted in the buffer, the mode 4 UE checks in step 811 whether the SL_RESOURCE_RESELECTION_COUNTER value reaches zero. If the SL_RESOURCE_RESELECTION_COUNTER value has not reached 0, the mode 4 terminal maintains the existing side link grant and performs the side link transmission in step 823.

When the SL_RESOURCE_RESELECTION_COUNTER value reaches 0, the mode 4 UE checks in step 813 whether the probResourceKeep value set by the RRC configuration is 0 or not. If the probResourceKeep value set by the RRC configuration is 0, the mode 4 UE sets a new side link grant by performing a common resource pool searching and reselection process without maintaining the previously used resources. If the probResourceKeep value set in advance by the RRC configuration is not 0, the mode 4 terminal selects an arbitrary real number in the [0, 1] interval in step 815, and checks whether the arbitrary real number selected is larger than the probResourceKeep value.

If the selected random number is smaller than the probResourceKeep value, the mode 4 UE further performs a partial search for the shared resource pool to which the mode 4 UE belongs before continuing to use the previously used resource.

If the selected random number is larger than the probResourceKeep value, the mode 4 UE determines that the previously used resource is not maintained and searches for and reselects the common resource pool to set a new side link grant.

In step 821, the mode 4 UE checks whether a resource selection conflict occurs by searching for a common resource pool performed additionally. If there is no resource selection collision by continuing to use the previously used resource, the mode 4 UE keeps the previously used resources and performs the side link transmission in step 823. In the case where a resource selection conflict occurs by continuously maintaining the previously used resources, the mode 4 UE performs a common resource pool search and a reselection process in step 819 to set a new side link grant.

In some embodiments, the embodiment of the partial search further performing to keep the resources used by the mode 4 terminal may include the following operations.

- Additional search mode 4 Maintains the search range of the terminal to be the same as the existing range (for example, search up to 1000ms of the present time reference)

- Extra search mode Set the search range of the mode 4 terminal to be shorter than the existing range (for example, search up to the present time point XXXms, XXX <1000)

- additional search mode 4 randomly select the resources to be searched within the search range of the terminal (for example, search for multiples of 3 sub-frame resources in the search target resource before 1000ms of the current time)

- In case of additional search, only some information needed for collision is extracted and judged (for example, the search process based on reference signal received power (RSRP) assignment information of the other terminal)

- In the additional search, excluding the search range performed at the resource preemption for the previous transmission, the search range is set up until immediately before the initial transmission of the mode 4 terminal (the corresponding embodiment has a large time difference from the selected resource of the mode 4 terminal to the initial transmission , It can be additionally performed in the resource pool search process of the mode 4 terminal)

In some embodiments, whenever the random selection value of the mode 4 terminal in the common resource pool is greater than the probResourceKeep value, every time the side link transmission is completed for the number of transmissions by the preemption point resource, The resource selection conflict can be avoided by searching for the resource usage status of the UE # 4. In other embodiments, if the random selection value of the mode 4 terminal in the public resource pool is smaller than the value of the probeResourceKeep, the mode 4 terminal maintains the existing side link grant and adds (partial) before performing the side link transmission to the pre- It is possible to prevent a collision with the mode 3 terminal scheduled by the base station by performing the search operation.

According to various embodiments of the present disclosure, in FIG. 8, the mode 4 UE searches for additional resource conflicts in the public resource pool based on the probResourceKeep probability threshold set by the base station and determines whether to maintain resources can do. Further, in accordance with various embodiments of the present disclosure, each of the steps of FIG. 8 above may be performed in a MAC entity except for setting the RRC probResourceKeep value.

FIG. 9 illustrates an exchange for establishing a period for a mode 3 UE to search for a common resource pool and report to a base station, and report a search result, when a common resource pool according to various embodiments of the present disclosure is formed. FIG. 9 illustrates signal exchange between the base station 110 and the terminal 120. FIG.

Referring to FIG. 9, in step 901, the BS can manage the public resource pool by using 1) a resource sharing pool list and a resource non-sharing pool list, or 2) an instruction message indicating whether each resource pool is shared or not . The base station can provide the transmission resource pool information to the mode 3 terminal using the RRCConnectionReconfiguration message or the SIB 21 or another RRC message.

In step 903, when the mode 3 UE operates in the common resource pool, the Node B can provide the mode 3 UE with a probResourceKeep value and a period for reporting to the Node B after the common resource pool search using the RRC message or the SIB 21 message have. At this time, the probResourceKeep value, the reporting period value, and the reportingMode value can be preset by the RRC configuration or can be selected by the base station implementation.

In step 905, after the mode 3 UE receives the probResourceKeep value and the reportingPeriod value from the common resource pool, the UE can change the reporting period value or change the reporting period value through the RRC message such as UEAssistanceInformation. In some embodiments, if the mode 3 terminal does not receive the side link communication service guarantee in the common resource pool, if the probResourceKeep value set is smaller, or if it determines that the measured channel busy ratio (CBR) value is larger than a certain criterion, The frequency of reporting can be increased. In other embodiments, if the set probResourceKeep value is greater or the mode 3 UE is receiving side link communication service assurance in the common resource pool and the measured CBR value is less than a certain criterion, increase the reportingPeriod value to lower the reporting frequency . In yet another embodiment, if the mode 3 terminal is no longer able to perform the search of the common resource pool, the mode 3 terminal may abort the search by changing the reportingMode value.

In step 907, when the reporting period value and the reporting period of the common resource pool search result of the mode 3 UE are determined through the RRC message by the Node B or the UE, the Node B requests the mode 3 UE for the common resource pool search.

In step 909, the mode 3 UE performs a common resource pool search. In step 911, the base station provides the uplink grant to the mode 3 terminal to report the common resource pool search result.

In step 913, the mode 3 UE can repeatedly perform the search and report according to the preset common resource pool search report period value.

According to various embodiments of the present disclosure, the mode 3 UE may adjust the frequency of common resource pool searching and reporting based on the probResourceKeep value and the reportingPeriod value in the common resource pool and avoid collision with the mode 4 UE. For example, the mode 3 terminal searches the status of the mode 4 terminal resource pool, decodes the SA information of the currently used resource and reports it to the base station. However, since the mode 4 terminal does not reflect recently changed preemption resource information of the mode 4 terminal, It is possible to prevent the collision by reducing the reporting period after searching SA information of the mode 4 UE by performing the above operation. For example, if the probResourceKeep value is low and the probability that the mode 4 UE will keep the resource being used is low, the mode 4 UE may reduce the reporting period after searching for the SA information to quickly reflect the resource information that is being used. . In another example, if the probResourceKeep value is higher than the Cursor mode 4 UE, the reporting period of the SA information of the mode 4 UE may be increased to increase reporting efficiency.

FIG. 10 is a flowchart illustrating a method for setting a maximum value T2 of a resource selection window when a mode 4 UE selects a resource after a UE-autonomous search in a common resource pool when a common resource pool according to various embodiments of the present disclosure is formed. Signal exchange. FIG. 10 illustrates signal exchange between the base station 110 and the terminal 120. FIG.

Referring to FIG. 10, in step 1001, the BS can manage a public resource pool using an instruction message indicating 1) a resource sharing pool list and a resource non-sharing pool list, or 2) whether each resource pool is shared or not . The base station can provide the transmission resource pool information to the mode 4 terminal using the RRCConnectionReconfiguration message or SIB 21 or another RRC message.

In step 1003, the mode 4 UE can inform the base station of the side link traffic pattern information (TrafficPatternInfoListSL), the delay limit report (delayBudgetReport), etc. to the base station through the UEAssistanceInformation message.

In step 1005, the mode 4 terminal reports the measured CBR value to the base station.

In step 1007, the base station may set the maximum value T2 of the resource selection range in the common resource pool to the mode 4 UE by reflecting the information. At this time, the T2 setting value can be sent by RRCConnectionReconfiguration message, SIB 21 message or other RRC message.

In some embodiments, if the data to be transmitted by the mode 4 terminal is still present and the value of the Resource Selection WindowT2 received from the base station is changed, the mode 4 terminal maintains the grant being used for the current side link transmission until the resource selection after the next common resource pool search , The V2X packet can be transmitted to the selected resource by applying the changed T2 value to the resource selection after searching the next common resource pool to be performed. In other embodiments, if there is data to be transmitted by the mode 4 terminal and the value of the Resource Selection WindowT2 received from the base station is changed, the mode 4 terminal can perform the reset without holding the grant in use for the side link transmission. In this case, the mode 4 UE can transmit the V2X packet to the selected resource by applying the changed T2 value to the resource selection after searching the common resource pool to be performed.

In some embodiments, the mode 4 terminal may set the maximum value T2 of the UE-autonomous resource selection range in the common resource pool to achieve a low delay requirement of the V2X side link transmission. In other embodiments, there is a period during which the side link transmission is not performed while waiting for the initial transmission from the resource preempted by the mode 4 UE, and another UE may allocate resources in the time difference and a collision may occur. In this case, the mode 4 UE can shorten the time difference from the common resource pool to the initial transmission by setting the maximum value T2 of the resource selection range to be short, and can prevent the collision.

The UEAssistanceInformation message transmitted in step 1003 is a message for informing the base station of the information of the UE, and is transmitted when the UE is connected to the base station. Thus, according to other embodiments of the present disclosure, step 1003 may be omitted.

In addition, in step 1005, in which the UE reports the CBR measurement value, the UE, which has received the SIB 21, the RRCConnectionReconfiguration message or another RRC message, reports the channel use status to the BS. Is performed separately from the operation. Thus, according to other embodiments of the present disclosure, step 1005 may be performed independently of steps 1003 and 1007.

FIG. 11 is a flowchart illustrating a signal exchange for setting a number of hybrid automatic repeat request (HARQ) retransmissions when a mode 4 UE selects resources after a UE-autonomous search in a common resource pool according to various embodiments of the present disclosure; Lt; / RTI > 11 illustrates the signal exchange between the base station 110 and the terminal 120. FIG.

Referring to FIG. 11, in step 1101, the BS can manage a public resource pool by using 1) a resource sharing pool list and a resource non-sharing pool list, or 2) an instruction message indicating whether each resource pool is shared or not . The base station can provide the transmission resource pool information to the mode 4 UE through the RRCConnectionReconfiguration message or the SIB 21 or another RRC message.

In step 1103, the mode 4 UE may notify the base station through a UEAssistanceInformation message such as a delayBudgetReport or a reliabilityBudgetReport.

In step 1105, the mode 4 terminal may report the measured CBR value to the base station. In step 1107, the BS may set the number of HARQ retransmissions in the common resource pool to the mode 4 UE by reflecting the information. At this time, the number of HARQ retransmissions can be set by an RRCConnectionReconfiguration message, an SIB 21 message or another RRC message.

In some embodiments, when the mode 4 UE belongs to the common resource pool, the base station directly sets the value of allowedRetxNumberPSSCH to 0 in the RRCConnectionReconfiguration message, the SIB 21 message, or another RRC message to set the HARQ retransmission restriction setting in the public resource pool . The embodiment can be expressed as follows in the RRC.

- SL-PSSCH-TxConfig embodiment for the side link HARQ retransmission operation

allowedRetxNumberPSSCH-r15 = {0}

allowedRetxNumberPSSCH-r14 allowedRetxNumberPSSCH-r15 OPTIONAL

In some embodiments, if the mode 4 terminal has data to transmit and the value of the allowedRetxNumberPSSCH received from the base station is changed to 0, the mode 4 terminal grants the grant currently used for the current side link transmission until the resource selection after the next common resource pool search And then transmits the V2X packet to the selected resource only once by applying the changed number of retransmissions to the resource selection after searching for the next common resource pool to be performed.

In other embodiments, when the mode 4 terminal has data to transmit and the value of the allowedRetxNumberPSSCH received from the base station is changed to 0, the mode 4 terminal can perform the reset without holding the grant in use for the side link transmission. At this time, the mode 4 UE can transmit the V2X packet only once by applying the changed number of retransmissions to the resource selection after searching the common resource pool to be performed.

- In other embodiments, when the mode 4 terminal has data to transmit and the value of the allowedRetxNumberPSSCH received from the base station is changed to 0, the mode 4 terminal is currently in use for the current side link transmission until the resource selection after the next common resource pool search Instead of retaining the grant, release the resources and grants that were preempted for the existing retransmission, and apply the modified retransmission count from the next transmission to send the V2X packet only once as the preempted resource.

In other embodiments, when the mode 4 UE belongs to the common resource pool, the base station directly sets the allowedRetxNumberPSSCH value to "both" in the RRCConnectionReconfiguration message, the SIB 21 message, or another RRC message, The HARQ retransmission number setting can be changed by the MAC CE message or the SCI format 1 message based on the reliability, the preference, the transmission delay for the side link transmission, and the CBR measured by the mode 4 UE. The embodiment can be expressed as follows in the RRC.

- SL-PSSCH-TxConfig embodiment for the side link HARQ retransmission operation

allowedRetxNumberPSSCH-r15 = {both}

allowedRetxNumberPSSCH-r14 allowedRetxNumberPSSCH-r15 OPTIONAL

In some embodiments, when the mode 4 terminal has data to transmit and the value of the allowedRetxNumberPSSCH received from the base station is changed to " both ", the mode 4 terminal uses the current side link transmission until the resource selection after the next common resource pool search And the number of HARQ retransmissions is changed by the MAC CE message or the SCI format 1 message based on the CBR measured by the mode 4 UE in the resource selection mode after searching for the next common resource pool to be performed. (Including the established retransmission).

- In other examples, when the mode 4 terminal has data to be transmitted and the value of the allowedRetxNumberPSSCH received from the base station is changed to " both ", the mode 4 terminal can perform the reset without holding the grant being used for the side link transmission In this case, when the resource is selected after the search of the common resource pool to be performed, the V2X packet is transmitted to the selected resource by applying the HARQ retransmission count to the MAC CE message or the SCI format 1 message based on the CBR measured by the mode 4 UE Including the established retransmission).

In another embodiment, when a mode 4 UE belongs to a common resource pool, when a base station directly sets an allowedRetxNumberPSSCH value in an RRCConnectionReconfiguration message, an SIB 21 message, or another RRC message, The HARQ retransmission count setting can be added. At this time, the HARQ retransmission count (SharedallowedRetxNumberPSSCH) used in the common resource pool can be further set by the base station. The embodiment can be expressed as follows in the RRC.

- SL-PSSCH-TxConfig embodiment for the side link HARQ retransmission operation

SharedallowedRetxNumberPSSCH

• allowedRetxNumberPSSCH-r14 SharedallowedRetxNumberPSSCH OPTIONAL - Cond CBR

In some embodiments, when the mode 4 UE has received data to be transmitted and the UE has received the allowedRetxNumberPSSCH or the SharedallowedRetxNumberPSSCH from the base station based on the CBR reported to the Node B, the mode 4 UE searches for the next common resource pool The Grant being used for the side link transmission is maintained and the V2X packet is transmitted to the selected resource by applying the changed HARQ retransmission count when the resource is selected after searching the common resource pool to be performed next (including the above-mentioned retransmission).

In other embodiments, when the mode 4 terminal has received data to be transmitted and the UE has received the allowedRetxNumberPSSCH or SharedallowedRetxNumberPSSCH from the base station based on the CBR reported to the Node B, the mode 4 UE does not maintain the grant being used for the side link transmission After the search of the common resource pool to be performed at this time, the V2X packet is transmitted to the selected resource by applying the changed HARQ retransmission count when the resource is selected (including the retransmission).

12 illustrates a new-effect exchange for setting a transmission parameter for a sidelink transmission in a public resource pool when a mode 4 terminal has a public resource pool formed according to various embodiments of the present disclosure. 12 illustrates signal exchange between the base station 110 and the terminal 120. In FIG.

Referring to FIG. 12, in step 1201, the BS can manage the common resource pool by using 1) a resource sharing pool list and a resource non-sharing pool list, or 2) an instruction message indicating whether each resource pool is shared or not . The base station can provide the transmission resource pool information to the mode 4 terminal using the RRCConnectionReconfiguration message or SIB 21 or another RRC message.

In step 1203, the mode 4 UE may notify the base station through a UEAssistanceInformation message such as a delayBudgetReport or a reliabilityBudgetReport.

In step 1205, the mode 4 terminal may report the measured CBR value to the base station. In step 1207, the base station sets transmission parameters to be used in the side link transmission in the public resource pool to the mode 4 UE in order to inform the mode 4 UE of an RRCConnectionReconfiguration message, an SIB 21 message, or another RRC message.

In some embodiments, the base station may use the UEAssistanceInformation message of the terminal to set transmission parameters that reflect CBR, packet delay budget, and reliability budget.

- SL-CBR-PPPP-TxConfigList example for setting the above transmission parameters

· Additional definition for SL-CBR-PPPP-Reliability-TxConfigList-r15 for Release 15 or later releases

(See the RRC standard in Release 14, for example, SL-CBR-PPPP-TxConfigList information element, below) to add reliability-ConfigIndex to the information element in the existing SL-CBR-PPPP-TxConfigList.

In some embodiments, when there is data to be transmitted from the mode 4 terminal and the SL-V2X-ConfigDedicated setting received from the base station is changed and the transmission parameter resetting is required, the mode 4 terminal searches the next common resource pool The Grant being used for the link transmission is maintained and the V2X packet can be transmitted to the selected resource by applying the changed SL-V2X-ConfigDedicated setting and the transmission parameter reset value to the resource selection after searching the next common resource pool to be performed. In other embodiments, when there is data to be transmitted by the mode 4 terminal and the SL-V2X-ConfigDedicated setting received from the base station is changed and transmission parameter resetting is required, the mode 4 terminal does not retain the grant being used for the side link transmission, In this case, the V2X packet can be transmitted to the selected resource by applying the changed SL-V2X-ConfigDedicated setting and the transmission parameter reset value to the resource selection after searching the common resource pool to be performed.

In some embodiments, the base station may be able to guarantee transmission reliability to individual UEs by reporting CBR measurements to Mode 4 UEs and allowing HARQ retransmission once or more for possible resource selection conflicts when CBR is high. In other embodiments, when the base station operates the common resource pool and the CBR of the common resource pool is further increased by preemption of the HARQ retransmission resource of the mode 4 UEs, the base station sets a transmission parameter setting for guaranteeing the transmission priority Can be performed. In yet another embodiment, a base station can observe a trade-off between increased reliability due to HARQ retransmissions of mode 4 terminals and increased congestion of the common resource pool when the base station is operating a common resource pool, and the base station can adjust the transmission parameters.

Referring to FIG. 13, scenario 1 can be exemplified when all the resources in the shared resource pool are shared between the mode 4 terminal 120 and the mode 3 terminal 130 and used.

In some embodiments, mode 4 terminal 120 and mode 3 terminal 130 may use a single pool of resources together. An example of scenario 1 in which a mode 4 terminal and a mode 3 terminal all use a single resource pool together may correspond to at least one of the following.

■ Sharing resource pools between Rel-15 mode 3 and Rel-15 mode 4;

■ Sharing resource pools between Rel-15 mode 3 and Rel-14 mode 4;

■ Sharing resource pools between Rel-14 mode 3 and Rel-15 mode 4;

Here, in order to acquire a shareable resource, the Rel-15 UE can sense a resource to be shared with the Rel-14 UE.

In one embodiment, the Rel-15 mode 3 terminal 130-1 or the Rel-15 mode 4 terminal 120-1 within the coverage of the base station 110 may determine which of the scenarios in the scenario 1 should operate according to the signaling . The signaling transmitted by the base station 110 may include at least one of a broadcast message for system information such as a system information block (SIB) 21 or a dedicated radio resource control (RRC) message (e.g., RRC reconfiguration) have.

Resource pool share information can be transmitted via SL-V2X-ConfigDedicated-r14 or SL-V2X-ConfigDedicated-r15 of RRC reconfiguration.

L-V2X-ConfigDedicated may include SL-CommResourcePoolV2X-r14 or SL-CommResourcePoolV2X-r15.

System information can transfer resource pool share information from SL-CommResourcePoolV2X-r14 or SL-CommResourcePoolV2X-r15.

In one embodiment, the shared resource information provided to a terminal outside the coverage of the base station 110 (e.g., a terminal located in an area where signaling of the base station 11 is not received or a terminal not receiving V2X information from the base station 110) And can be provided in a pre-configuration. In some embodiments, the SL-V2X-PreconfigFreqInfo ASN.1 configuration can be defined as shown in Table 4 below.

Here, v2x-CommTxPoolList may refer to a resource pool list to which resource pool sharing is not applied. The terminal may perform a sensing operation to acquire resources from the pool.

v2x-CommTxSharedPoolList can refer to a list of resource pools to which resource pool sharing is applied. The terminal may perform a sensing operation to acquire resources from the pool.

The RRC ASN.1 utilizing methods according to various embodiments of the present disclosure may be as follows.

The shared pool information indicated to the terminal may be represented by a Boolean notation indicating whether the resource can be shared or a resource pool ID indicating the shared resource pool index information.

The method of using RRC ASN.1 for resource sharing scenario between mode 3 and mode 4 may be as follows.

In the case of sharing between Rel-15 mode 3 and Rel-15 mode 4, it is possible to indicate the new structure definition of Rel-15 or to include the resource pool sharing information of Rel-15 application in the existing Rel-14 structure (SL -CommResourcePoolV2X-r15).

In the case of sharing between the Rel-14 mode 3 and the Rel-15 mode 4, the SL-CommResourcePoolV2X-r14 of the Rel-14 can be instructed to include the resource pool sharing information of the Rel-15 application (mode 4).

In the case of Rel-15 mode 3 and Rel-14 mode 4, it is possible to instruct SL-CommResourcePoolV2X-r14 of Rel-14 by including resource pool sharing information of Rel-15 application (mode 3).

Referring to FIG. 14, FIG. 14 explains a specific embodiment in which the PSCCH resource and the PSSCH resource are adjacency with respect to the scenario 1 of FIG. In this case, the following resource pool structure can be exemplified.

1) Resource pool structure shared between Rel-15 mode 3 and Rel-15 mode 4

2) Resource pool structure shared between Rel-15 mode 3 and Rel-14 mode 4

3) Resource pool structure shared between Rel-14 mode 3 and Rel-15 mode 4

In some embodiments, if all of the resources are shared, the terminal may verify whether the resources are shared.

In the first embodiment, the UE can confirm the shared state of resources (whether shared resources are used) through Shared_Pool-r15 (see Table 5 below). If Shared_Pool-r15 is true, the UE can confirm that the shared resource pool is available. On the other hand, if Shared_Pool-r15 is False, the UE can confirm that the shared resource pool can not be used. In some embodiments, when sharing resources between a Rel-14 terminal and a Rel-15 terminal, the RRC ASN.1 configuration can be defined as shown in Table 5 below.

Here, Shared_Pool-r15 may indicate whether resources are shared or not.

The adjacency PSCCH-PSSCH-r14 may indicate the presence or absence of proximity between the PSCCH resource and the PSSCH resource.

StartRB-Subchannel-r14 may indicate the lowest RB (resource block) index of a subchannel.

sizeSubchannel-r14 can represent the number of physical resource blocks (PRB) of each subchannel.

numSubchannel-r14 may represent the number of subchannels.

SensingOperation-r15 may indicate the case of using a shared resource with a mode 4 terminal instead of using resources allocated to the mode 3 terminal as a dedicate. Mode 3 When a terminal uses a shared resource, resources can be acquired based on sensing. If the parameter value is False, the mode 3 UE can use dedicated resources. If the parameter value is True, the mode 3 UE can use resources obtained as a result of sensing the shared resource.

In the second embodiment, the UE can confirm using the Shared_PoolID (see Table 6 below).

■ The base station can provide a list of resource pools that can share the resource pool.

The UE can determine that resource sharing is possible only for the resource pool included in Shared_PoolID-r15. If resource sharing is applied to Pool ID1, the BS can stop sharing resources in Pool ID1 if the BS provides Shared_PoolID excluding Pool ID1.

In some embodiments, when sharing resources between Rel-14 and Rel-15 terminals, the RRC ASN.1 configuration can be defined as shown in Table 6 below.

Here, v2x-SharedTxPool-r15 may represent a list of pool IDs sharing resources.

Shared_PoolID-r15 may indicate a resource-shareable resource pool list.

startRB-Subchannel-r14 can represent the lowest RB index of the subchannel.

sizeSubchannel-r14 can represent the number of PRBs of each subchannel.

numSubchannel-r14 may represent the number of subchannels.

SensingOperation-r15 may indicate the case of using the shared resource with the mode 4 terminal instead of using the resource dedicated to the mode 3 terminal. Mode 3 When a terminal uses a shared resource, resources can be acquired based on sensing. If the parameter value is False, the mode 3 UE can use dedicated resources. If the parameter value is True, the mode 3 UE can use resources obtained as a result of sensing the shared resource.

In resource sharing between Rel-15 terminals, an embodiment for the RRC ASN.1 configuration can be described as the first and second embodiments. Instead of reusing the Rel-14 parameter, a Rel-15 parameter that acts like the Rel-14 parameter can be newly defined. For example, the following parameters can be newly defined with the Rel-15 parameter.

adjacencyPSCCH-PSSCH-r15: Indicates whether the PSCCH resource is adjacent to the PSSCH resource

StartRB-Subchannel-r15: Indicates the lowest RB index of the subchannel

sizeSubchannel-r15: indicates the number of PRBs for each subchannel

numSubchannel-r15: represents the number of subchannels

In some embodiments, if all resources are shared, the terminal may verify whether the resource is shared.

In the first embodiment, the UE can determine the shared state of resources (whether shared resources are used) through Shared_Pool-r15. If Shared_Pool-r15 is true, the UE can confirm that the shared resource pool is available. On the other hand, if Shared_Pool-r15 is False, the UE can confirm that the shared resource pool can not be used.

In some embodiments, when sharing resources between Rel-15 terminals, the RRC ASN.1 configuration may be defined as shown in Table 7 below.

Here, Shared_Pool-r15 may indicate whether resources are shared or not.

The adjacency PSCCH-PSSCH-r15 may indicate the presence or absence of proximity between the PSCCH resource and the PSSCH resource.

StartRB-Subchannel-r15 may represent the lowest RB index of the subchannel.

sizeSubchannel-r15 can represent the number of PRBs of each subchannel.

numSubchannel-r15 may represent the number of subchannels.

SensingOperation-r15 may indicate the case of using the shared resource with the mode 4 terminal instead of using the resource dedicated to the mode 3 terminal. Mode 3 terminal can acquire resources based on sensing when using shared resources. If the parameter value is False, the mode 3 UE can use dedicated resources. If the parameter value is True, the mode 3 UE can use resources obtained as a result of sensing the shared resource.

In the second embodiment, using Shared_PoolID (see Table 8 below)

Resource Pool Sharing at the base station.

The UE can determine that Resource Sharing is possible only for the Pool included in the Shared_PoolID. When Resource Sharing is applied to Pool ID1, if the base station provides Shared_PoolID excluding Pool ID1, the UE can suspend Resource Sharing from Pool ID1.

In some embodiments, when sharing resources between Rel-15 terminals, the RRC ASN.1 configuration may be defined as shown in Table 8 below.

Here, v2x-SharedTxPool-r15 can represent a list of pool IDs sharing resources. Shared_PoolID-r15 may indicate a list of resource pools that can share resources. startRB-Subchannel-r15 may indicate the lowest RB index of the subchannel. sizeSubchannel-r15 can represent the number of PRBs of each subchannel. numSubchannel-r15 may represent the number of subchannels. SensingOperation-r15 may indicate the case of using the shared resource with the mode 4 terminal instead of using the resource dedicated to the mode 3 terminal. If the SensingOperation-r15 parameter value is False, the mode 3 UE can use dedicated resources. If the SensingOperation-r15 parameter value is True, the mode 3 UE can use the resources obtained as a result of sensing the shared resource.

Referring to FIG. 15, FIG. 15 illustrates a specific embodiment in which PSCCH resources and PSSCH resources are not adjacent to the scenario 1 of FIG. In this case, the following resource pool structure can be exemplified.

1) Resource pool structure shared between Rel-15 mode 3 and Rel-15 mode 4

2) Resource pool structure shared between Rel-15 mode 3 and Rel-14 mode 4

3) Resource pool structure shared between Rel-14 mode 3 and Rel-15 mode 4

In some embodiments, if all of the resources are assumed to be in a shared state, the terminal can confirm whether or not the resources are shared.

In the first embodiment, the UE can confirm the shared state of resources (whether shared resources are used) through Shared_Pool-r15.

In some embodiments, when sharing resources between Rel-14 and Rel-15 terminals, the RRC ASN.1 configuration can be defined as shown in Table 9 below.

Here, Shared_Pool-r15 may indicate whether resources are shared or not. adjacency PSCCH-PSSCH-r14 may be set to False to indicate non-adjacency between the PSCCH resource and the PSSCH resource. startRB-PSCCH-Pool-r14 may indicate the lowest RB index of the PSCCH. sizeSubchannel-r14 can represent the number of PRBs of each subchannel. numSubchannel-r14 may represent the number of subchannels. SensingOperation-r15 may indicate the case of using the shared resource with the mode 4 terminal instead of using the resource dedicated to the mode 3 terminal. Mode 3 When a terminal uses a shared resource, resources can be acquired based on sensing.

In the second embodiment, the terminal can use Shared_PoolID (see Table 10 below).

In some embodiments, when sharing resources between a Rel-14 terminal and a Rel-15 terminal, the RRC ASN.1 configuration can be defined as shown in Table 10 below.

Here, v2x-SharedTxPool-r15 may represent a list of pool IDs sharing resources. Shared_PoolID-r15 may indicate a resource-shareable resource pool list. adjacency PSCCH-PSSCH-r14 may be set to False to indicate non-proximity between the PSCCH resource and the PSSCH resource. startRB-PSCCH-Pool-r14 may indicate the lowest RB index of the PSCCH. sizeSubchannel-r14 can represent the number of PRBs of each subchannel. numSubchannel-r14 may represent the number of subchannels. SensingOperation-r15 may indicate the case of using the shared resource with the mode 4 terminal instead of using the resource dedicated to the mode 3 terminal. When SensingOperation-r15 is set to True, the mode 3 terminal can acquire resources based on sensing when using shared resources.

In resource sharing between Rel-15 terminals, an embodiment for the RRC ASN.1 configuration can be described as the first and second embodiments. Instead of reusing the Rel-14 parameter, a Rel-15 parameter that acts like the Rel-14 parameter can be newly defined.

In some embodiments, when sharing resources between Rel-15 terminals, the RRC ASN.1 configuration may be defined as shown in Table 11 below.

Here, Shared_Pool-r15 may indicate whether resources are shared or not. adjacency PSCCH-PSSCH-r15 may be set to False to indicate non-proximity between the PSCCH resource and the PSSCH resource. startRB-PSCCH-Pool-r15 may indicate the lowest RB index of the PSCCH. sizeSubchannel-r15 can represent the number of PRBs of each subchannel. numSubchannel-r15 may represent the number of subchannels. SensingOperation-r15 may indicate the case of using the shared resource with the mode 4 terminal instead of using the resource dedicated to the mode 3 terminal. When SensingOperation-r15 is set to True, the mode 3 terminal can acquire resources based on sensing when using shared resources.

In the second embodiment, using Shared_PoolID (see Table 12 below)

In some embodiments, when sharing resources between Rel-15 terminals, the RRC ASN.1 configuration may be defined as shown in Table 12 below.

Here, v2x-SharedTxPool-r15 can represent a list of pool IDs sharing resources. Shared_PoolID-r15 may indicate a list of resource pools that can share resources. adjacency PSCCH-PSSCH-r15 may be set to False to indicate non-proximity between the PSCCH resource and the PSSCH resource. startRB-PSCCH-Pool-r15 may indicate the lowest RB index of the PSCCH. sizeSubchannel-r15 can represent the number of PRBs of each subchannel. numSubchannel-r15 may represent the number of subchannels. SensingOperation-r15 may indicate the case of using the shared resource with the mode 4 terminal instead of using the resource dedicated to the mode 3 terminal. When SensingOperation-r15 is set to True, the mode 3 terminal can acquire resources based on sensing when using shared resources.

Figure 16 shows an example of operation in which only some of the resources in the resource pool are used together in mode 3 and mode 4 according to various embodiments of the present disclosure.

Referring to FIG. 16, a case in which some resources in the resource pool are shared between the mode 4 terminal 120 and the mode 3 terminal 130 can be exemplified as the scenario 2.

In some embodiments, mode 4 terminal 120 and mode 3 terminal 130 may use a portion of the resource pool together. An example of scenario 1 in which a mode 4 terminal and a mode 3 terminal use a part of a single resource pool may correspond to at least one of the following.

Sharing resource pools between Rel-15 mode 3 and Rel-15 mode 4;

Sharing resource pools between Rel-15 mode 3 and Rel-14 mode 4;

Sharing resource pools between Rel-14 mode 3 and Rel-15 mode 4;

In this case, in order to acquire a shareable resource, the Rel-15 UE can sense a resource to be shared with the Rel-14 UE.

In one embodiment, the Rel-15 mode 3 terminal 130-1 or the Rel-15 mode 4 terminal 120-1 within the coverage of the base station 110 may determine which of the scenarios in the scenario 1 should operate according to the signaling . The signaling transmitted by the base station 110 may include at least one of a broadcast message such as SIB 21 or a dedicated RRC message.

The base station 110 may transmit SL-V2X-ConfigDedicated-r14 or SL-V2X-ConfigDedicated-r15 of RRC reconfiguration.

SL-V2X-ConfigDedicated can include SL-CommResourcePoolV2X-r14 or SL-CommResourcePoolV2X-r15.

System information can be sent to SL-CommResourcePoolV2X-r14 or SL-CommResourcePoolV2X-r15.

In one embodiment, the shared resource information provided to a terminal outside the coverage of the base station 110 (e.g., a terminal located in an area where signaling of the base station 11 is not received or a terminal not receiving V2X information from the base station 110) And can be provided in a pre-configuration. In some embodiments, the SL-V2X-PreconfigFreqInfo ASN.1 configuration may be defined as shown in Table 13 below.

Here, v2x-CommTxPoolList may refer to a list of resource pools to which resource pool sharing is not applied. The terminal may perform a sensing operation to acquire resources from the pool.

If sharing between Rel-15 mode 3 and Rel-15 mode 4, you can define resource pool sharing information for Rel-15's new structure definition (SL-CommResourcePoolV2X-r15) or Rel-15 for existing Rel-14 structure have.

In the case of sharing between Rel-14 mode 3 and Rel-15 mode 4, a new parameter for resource pool sharing of Rel-15 application (mode 4) can be added to SL-CommResourcePoolV2X-r14 of Rel-14.

In Rel-15 mode 3 and Rel-14 mode 4, new parameters for resource pool sharing of Rel-15 application (mode 3) can be added to SL-CommResourcePoolV2X-r14 of Rel-14.

Referring to FIG. 17, FIG. 17 illustrates a specific embodiment in which the PSCCH resource and the PSSCH resource are adjacent to the scenario 2 in FIG.

In some embodiments, if some resources are shared, the terminal may check availability of some shared resource pools.

In the first embodiment, the UE can confirm availability of some shared resource pools through the Shared_Pool-r15 through the sharing information of the resources and the presence or absence of the startRB-shared_Subchannel information. If Shared_Pool-r15 is True, the UE can confirm that the shared resource pool is available. On the other hand, if Shared_Pool-r15 is False, the UE can confirm that the shared resource pool can not be used. If Shared_Pool-r15 is True and StartRB-shared_Subchannel information is included, the terminal may determine that a partially shared resource pool is available.

In some embodiments, when sharing some resources between Rel-14 and Rel-15 terminals, the RRC ASN.1 configuration can be defined as shown in Table 14 below.

Here, Shared_Pool-r15 may indicate whether resources are shared or not.

StartRB-Subchannel-r14 may indicate the lowest RB index of the subchannel.

startRB-shared_Subchannel-r15 can represent the lowest RB index in some shared resource pools.

endRB-shared_Subchannel-r15 can represent the last RB index in some shared resource pools. If endRB-shared_Subchannel-r15 is not included, the UE can allocate some shareable resources (for example, the last RB can be derived by sizeSubchannel-r14 x numSubchannel-r14) from the RB indicated by startRB-shared_Subchannel- .

sizeSubchannel-r14 can represent the number of PRBs of each subchannel.

numSubchannel-r14 may represent the number of subchannels.

SensingOperation-r15 may indicate the case of using a shared resource with a mode 4 terminal instead of using resources allocated to the mode 3 terminal as a dedicate. If the parameter value is False, the mode 3 UE can use dedicated resources. If the parameter value is True, the mode 3 UE can use resources obtained as a result of sensing the shared resource.

In the second embodiment, the UE can determine the sharing information of the resource using the Shared_PoolID and determine the degree of sharing based on whether the startRB-shared_Subchannel information is included or not.

The base station can provide a list of some shareable resource pools.

The UE can determine that resource sharing is possible only for the resource pool included in the Shared_PoolID. If the startRB-shared_Subchannel information is included, the terminal can determine that the resource pool is some shared resource. If resource sharing is applied to Pool ID1, the Node B can stop sharing resources in Pool ID1 when providing the Shared_PoolID excluding Pool ID1.

In some embodiments, when sharing some resources between Rel-14 and Rel-15 terminals, the RRC ASN.1 configuration can be defined as shown in Table 15 below.

Here, v2x-SharedTxPool-r15 may represent a list of pool IDs sharing resources.

Shared_PoolID-r15 may indicate a resource-shareable resource pool list.

startRB-Subchannel-r14 can represent the lowest RB index of the subchannel.

endRB-shared_Subchannel-r15 can represent the last RB index in some shared resource pools. If endRB-shared_Subchannel-r15 is not included, the UE can allocate some shareable resources (for example, the last RB can be derived as sizeSubchannel-r14 x numSubchannel-r14) from the RB indicated by startRB-shared_Subchannel- .

sizeSubchannel-r14 can represent the number of PRBs of each subchannel.

numSubchannel-r14 may represent the number of subchannels.

SensingOperation-r15 may indicate the case of using the shared resource with the mode 4 terminal instead of using the resource dedicated to the mode 3 terminal. If the parameter value is False, the mode 3 UE can use dedicated resources. If the parameter value is True, the mode 3 UE can use resources obtained as a result of sensing the shared resource.

When some resources are shared between Rel-15 terminals, the terminal can confirm whether or not the resources are partially shared.

In the first embodiment, the UE can determine the shared state of the resource (whether or not the shared resource is used) through Shared_Pool-r15, and determine whether the resource is partially shared or not by including the startRB-shared_Subchannel information.

If Shared_Pool-r15 is true, the UE can confirm that the shared resource pool is available. On the other hand, if Shared_Pool-r15 is False, the UE can confirm that the shared resource pool can not be used.

If Shared_Pool-r15 is true and StartRB-shared_Subchannel information is included, the terminal can determine that some shared resource pools can be used.

In some embodiments, when sharing resources between Rel-15 terminals, the RRC ASN.1 configuration may be defined as shown in Table 16 below.

Here, Shared_Pool-r15 may indicate whether resources are shared or not.

The adjacency PSCCH-PSCCH-r15 can indicate whether the Rel-15 is adjacent to the PSCCH resource and the PSSCH resource.

StartRB-Subchannel-r15 can represent the lowest RB index of the sub-channel of the Rel-15 resource.

sizeSubchannel-r15 can represent the number of PRBs of each sub-channel of the Rel-15 resource.

numSubchannel-r15 may represent the number of sub-channels of the Rel-15 resource.

endRB-shared_Subchannel-r15 can represent the last RB index in some shared resource pools. If the endRB-shared_Subchannel-r15 is not included, the UE can calculate the RB from the RB corresponding to StartRB-shared_Subchannel-r15 to the last RB (for example, the last RB value can be derived by sizeSubchannel-r15 x numSubchannel-r15) It can be judged as a resource pool.

In the second embodiment, the UE can determine the sharing information of the resource through the Shared_PoolID and determine the degree of sharing based on the presence or absence of the startRB-shared_Subchannel information.

The base station can provide a list of some shareable resource pools.

In some embodiments, when sharing some resources between Rel-15 terminals, the RRC ASN.1 configuration may be defined as shown in Table 17 below.

Here, v2x-SharedTxPool-r15 may represent a list of pool IDs sharing resources.

Shared_PoolID-r15 may indicate a resource-shareable resource pool list.

numSubchannel-r15 can represent the number of Rel-15 subchannels.

endRB-shared_Subchannel-r15 can represent the last RB index in some shared resource pools. If endRB-shared_Subchannel-r15 is not included, then the terminal shall deduce from the RB indicated by startRB-shared_Subchannel-r15 to the last RB (for example, the last RB may be derived by sizeSubchannel-r15 x numSubchannel-r15) Can be used.

Referring to FIG. 18, FIG. 17 illustrates a specific embodiment in which the PSCCH resource and the PSSCH resource are not adjacent to the scenario 2 in FIG.

In some embodiments, when sharing some resources between Rel-14 and Rel-15 terminals, the RRC ASN.1 configuration can be defined as shown in Table 18 below.

Here, Shared_Pool-r15 may indicate whether resources are shared or not.

StartRB-Subchannel-r14 may indicate the lowest RB index of the subchannel.

sizeSubchannel-r14 can represent the number of PRBs of each subchannel.

numSubchannel-r14 may represent the number of subchannels.

In the second embodiment, the UE can determine the sharing information of the resource (i.e., the shared resource pool list) using the Shared_PoolID and determine the degree of sharing based on whether the startRB-shared_Subchannel information is included or not.

The base station can provide a list of resource pools that can share some of the resource pools.

In some embodiments, when sharing some resources between Rel-14 and Rel-15 terminals, the RRC ASN.1 configuration can be defined as shown in Table 19 below.

Here, v2x-SharedTxPool-r15 may represent a list of pool IDs sharing resources.

Shared_PoolID-r15 may indicate a resource-shareable resource pool list.

startRB-Subchannel-r14 can represent the lowest RB index of the subchannel.

sizeSubchannel-r14 can represent the number of PRBs of each subchannel.

numSubchannel-r14 may represent the number of subchannels.

In some embodiments, when sharing resources between Rel-15 terminals, the RRC ASN.1 configuration may be defined as shown in Table 20 below.

Here, Shared_Pool-r15 may indicate whether resources are shared or not.

The adjacency PSCCH-PSCCH-r15 may indicate the presence or absence of proximity between the PSCCH resource and the PSSCH resource.

startRB-PSCCH-Pool-r15 may indicate the lowest RB index information of the PSCCH.

The base station can provide a list of some shareable resource pools.

In some embodiments, when sharing some resources between Rel-15 terminals, the RRC ASN.1 configuration may be defined as shown in Table 21 below.

Here, v2x-SharedTxPool-r15 may represent a list of pool IDs sharing resources.

Shared_PoolID-r15 may indicate a resource-shareable resource pool list.

numSubchannel-r15 can represent the number of Rel-15 subchannels.

19 illustrates signaling for use of a shared resource pool in accordance with various embodiments of the present disclosure. FIG. 19 is a block diagram of a terminal A (Rel-15 mode 4 terminal) 120-1, a terminal D (Rel-14 mode 4 terminal) 120-2, a terminal B (Rel- 15 mode 3 terminal 130-1) 14 mode 3 terminal 130-2), and the base station 110. [

19, in steps 1901 to 1907, the base station transmits a radio resource pool configuration for each of the versions (Rel-14 to Rel-15) and each mode (mode 3 to mode 4) Can be set.

Specifically, in step 1901, the base station transmits the v2x-schedulingPool in a radio resource pool configuration that the Rel-15 mode 3 UE can use. In step 1903, the base station transmits the v2x-schedulingPool in a radio resource pool configuration that the Rel-14 mode 3 UE can use. In step 1905, the base station transmits a v2x-CommTxPoolNormalCommon to the radio resource pool configuration usable by the Rel-14 mode 4 UE. In step 1907, the base station transmits v2x-CommTxPoolNormalCommon to the radio resource pool configuration that the Rel-15 mode 4 terminal can use.

v2x-schedulingPool and v2x-CommTxPoolNormalCommon may be used to set up shared resources as in the embodiments of FIGS. 14 and 15 above.

In step 1909, the Rel-15 mode 4 terminal, the Rel-14 mode 4 terminal, the Rel-15 mode 3 terminal, and the Rel-14 mode 3 terminal include the shared resource pool according to the CBR setting of the base station or the CBR setting of the V2X system Or may measure the CBR for a radio resource pool that does not include the CBR measurement result and transmit the CBR measurement result to the base station.

In step 1911, the base station uses the CBR measurement values received from the Rel-15 mode 4 terminal, the Rel-14 mode 4 terminal, the Rel-15 mode 3 terminal, and the Rel-14 mode 3 terminal, The CBR state for the radio resource pool including the resource pool or the shared resource pool can be determined. Based on the CBR status determination result according to the embodiment of the present disclosure, the base station transmits a shared resource that can be used in Rel-15 mode 4 terminal, Rel-14 mode 4 terminal, Rel-15 mode 3 terminal, Rel- The pool candidate can be determined.

A method for determining a shared resource pool candidate to be used for resource sharing between terminal A (Rel-15 mode 4 terminal) and terminal B (Rel-15 mode 3 terminal)

Embodiment 1, Remaining Mode 3 (or Mode 4) Application CBR of a resource pool is lower than CBR of a shared resource pool.

Embodiment 2, the CBR of the shared resource pool is lower than a certain threshold, and the load of the remaining mode 3 shared resource pool is lower than a certain threshold.

Example 3, Remaining Mode 3 (or the remaining Mode 4) Use CBR of Resource Pool is higher than CBR of shared resource pool.

Embodiment 4, the CBR of the shared resource pool is higher than a certain threshold, and the load of the remaining Mode 3 scheduling resource pool is lower than a certain threshold.

Embodiment 5, the CBR of the shared resource pool is lower than a certain threshold, and the load of the remaining mode 3 scheduling resource pool is higher than a certain threshold.

Embodiment 6, the CBR of the shared resource pool is higher than a certain threshold and the load of the remaining mode 3 scheduling resource pool is higher than a certain threshold.

Embodiment 7, Mode 4 The CBR of the resource pool is higher than a certain threshold.

Embodiment 8, Mode 4 The CBR of the resource pool is lower than a certain threshold.

Embodiment 9, CBR of the shared resource pool is lower than a certain threshold.

Embodiment 10, CBR of the shared resource pool is higher than a certain threshold.

A method of determining a shared resource pool candidate to be used for resource sharing between terminal A (Rel-15 mode 4 terminal), terminal B (Rel-15 mode 3 terminal), and terminal C (Rel-14 mode 3 terminal)

Embodiment 1, Remaining Rel-14 Mode 3 Usage The CBR of the scheduling resource pool is lower than the CBR of the shared resource pool.

Embodiment 2, the CBR of the shared resource pool is lower than a certain threshold, and the load of the remaining Rel-14 mode 3 scheduling resource pool is lower than a certain threshold.

Embodiment 3, Remaining Rel-14 Mode 3 Usage The CBR of the scheduling resource pool is higher than that of the shared resource pool.

Embodiment 4, the CBR of the shared resource pool is lower than a certain threshold and the load of the remaining Rel-14 mode 3 scheduling resource pool is higher than a certain threshold.

Embodiment 5, the CBR of the shared resource pool is higher than a certain threshold and the load of the remaining Rel-14 mode 3 scheduling resource pool is lower than a certain threshold.

Embodiment 6 The CBR of the shared resource pool is higher than a certain threshold and the load of the remaining Rel-14 mode 3 scheduling resource pool is higher than a certain threshold.

Embodiment 7, CBR of the shared resource pool is lower than a certain threshold.

Example 8, the CBR of the remaining Rel-14 mode 3 resource pool is lower than a certain threshold.

Embodiment 9, CBR of the shared resource pool is higher than a certain threshold.

The CBR of the remaining Rel-14 mode 3 resource pool of Embodiment 10 is higher than a certain threshold.

A method of determining a shared resource pool to be used for resource sharing between terminal A (Rel-15 mode 4 terminal), terminal B (Rel-15 mode 3 terminal), and terminal D (Rel-14 mode 4 terminal)

Embodiment 1, Remaining Rel-14 Mode 4 Application CBR of the resource pool is lower than that of the shared resource pool.

Embodiment 2, CBR of the shared resource pool is lower than a certain threshold.

Example 3, the CBR of the remaining Rel-14 mode 4 resource pool is lower than a certain threshold.

Example 4, Remaining Rel-14 Mode 4 Application CBR of resource pool is higher than CBR of shared resource pool.

Embodiment 5, CBR of the shared resource pool is higher than a certain threshold.

Example 6, the remaining Rel-14 mode 4 resource pool CBR is higher than a certain threshold.

In a case where the condition for determining the shared resource pool candidate in the operation of the step 1911 is satisfied (when there is a high possibility of using the shared resource pool between the Rel-15 terminals or between the Rel-14 terminal and the Rel-15 terminal The base station is able to operate the CBR valid timer for the validation of the application of the shared resource pool (CBR validation in one embodiment).

A CBR valid timer (timer) is started when a candidate is determined as a condition for determining a shared resource pool candidate

In the embodiment where the CBR valid timer is operated in step 1913, if the terminal A, the terminal B, the terminal C, and the terminal D transmit CBR to the base station before the expiration of the CBR valid timer, the base station can perform the operation of step 1911 again . If it is necessary to change the currently selected candidate shared resource pool through the operation of step 1911, the base station can reset the CBR valid timer and operate the CBR valid timer for the newly selected candidate shared resource pool.

In step 1915, when the terminal B or the terminal C requests resource allocation to the side link BSR before the expiration of the CBR valid timer, the base station allocates side link resources to the terminal in the candidate shared resource pool The base station releases the selected candidate shared resource pool. At this time, the CBR valid timer for the candidate shared resource pool is reset. In another embodiment, if the terminal B or the terminal C requests resource allocation to the side link BSR before expiration of the CBR valid timer, if the base station determines that the side link resource allocation is possible in the resource pool other than the candidate shared resource pool, The CBR valid timer operation for the candidate shared resource pool can be continued.

In step 1917, the base station selects one of the candidate shared resource pools and can instruct the terminal A, the terminal B, the terminal C, and the terminal D of the radio resource pool information reflecting the selected shared resource pool information. In the CBR valid timer operating example, if the CBR valid timer expires, the base station performs the operation of step 1917.

20 shows a flow diagram of a base station in accordance with various embodiments of the present disclosure. 20 illustrates the operation of the base station 110. As shown in FIG. 20 is a diagram illustrating an embodiment of a base station operation for operation of a shared resource pool or a candidate shared resource pool according to step 1915 of FIG. 19 (whether a side link BSR is received).

Referring to FIG. 20, in step 2001, a base station can determine whether to allocate resources of a candidate shared resource pool (or a shared resource pool) upon receiving a side link BSR from a Rel-14 mode 3 terminal or a 15 mode 3 terminal. In one embodiment, when a resource is to be allocated in the candidate shared resource pool, the candidate shared resource pool is excluded from the shared resource. In another embodiment, when resources are to be allocated in the shared resource pool, the base station determines to stop sharing the shared resource pool.

In step 2003, if a resource needs to be allocated in the shared resource pool, the base station can determine whether the Rel-15 mode 4 terminal uses the shared resource pool. An embodiment of information that can be used to determine if a Rel-15 mode 4 terminal is using a shared resource pool may be as follows. If the value of Shared_Pool-r15 is set to True when Shared_Pool-r15 is represented as Boolean, or if Shared_PoolID-r15 is listed as a pool list, the resource pool index of the shared resource pool can be included.

In step 2005, if the Rel-15 mode 4 UE is using a shared resource pool, the base station can instruct the Rel-15 mode 4 UE to stop using the shared resource pool.

An example of a parameter that can be used to signal the disabling of a shared resource pool may be: If Shared_Pool-r15 is represented as Boolean, information of Shared_PoolID-r15 may be set excluding the resource pool index when the value of Shared_Pool-r15 is set to False or Shared_PoolID-r15 is indicated.

If resources are to be allocated in the shared resource pool, the base station can perform the operation in step 2007 if it determines that the Rel-15 mode 4 terminal is not using the shared resource pool.

In step 2007, the base station may allocate resources to be used by the UE in the shared resource pool to the Rel-15 mode 3 terminal or the Rel-14 mode 3 terminal. The resource allocation information may be known, for example, as DCI 5A.

Figure 21 shows another flow diagram of a base station in accordance with various embodiments of the present disclosure. FIG. 21 illustrates operation of the base station 110. 21 is a diagram illustrating an example of a base station operation when a CBR valid timer is operated for a candidate shared resource pool in the operation of step 1911 of FIG.

Referring to FIG. 21, in step 2101, after expiration of the CBR valid timer, the base station can determine the candidate shared resource pool as a shared resource pool.

In step 2103, the base station includes shared resource pool information determined to be shared and used by the mode 3 terminal of Rel-14, the mode 4 terminal of Rel-14, the mode 3 terminal of Rel-15, and the mode 4 terminal of Rel-15 Lt; / RTI > radio resource pool configuration. The base station can instruct the Rel-15 mode 4 UE to grant a usage permission for the shared resource pool determined to be shared.

In some embodiments, the steps 1901 to 1907 of the above 19 may be performed as an embodiment of the radio resource pool configuration including the shared resource pool information.

Herein, the base station sets the shared resources of the Rel-15 mode 4 terminal and the Rel-15 mode 3 terminal and the resources of the Rel-14 mode 4 terminal and the Rel-14 mode 3 terminal considering the shared resource according to the embodiment of this disclosure Lt; / RTI >

An embodiment of the information included in the radio resource pool information message may be as follows. If the information of Shared_Pool-r15 is expressed as Boolean, it can be indicated as Shared_Pool-r15 value set to True or Shared_PoolID-r15 if PoolID of shared resource pool.

Figure 22 illustrates signaling for directing the use of shared resources in accordance with various embodiments of the present disclosure. 22 illustrates signal exchange between the terminal A (Rel-14 mode 4 terminal) 120-2, the terminal B (Rel-15 mode 3 terminal) 130-1, and the base station 110. Fig. FIG. 22 is a diagram illustrating a signal flow between a UE and a BS indicating allocation of a shared resource based on a sensing-based shared resource as another embodiment of allocating a shared resource pool to a Rel-15 mode 3 UE.

22, when the Rel-14 mode 4 UE can share the resource pool being used by the Rel-15 mode 3 UE (B-UE), instead of directly allocating resources of the shared resource pool to the Rel- 15 < / RTI > mode 3 terminal. When a Rel-15 mode 3 terminal requests a resource from a base station, a condition for selecting a resource of the shared resource pool to use as a sensing base is based on the data (application or service) type of the Rel-15 mode 3 terminal . That is, when the reliability or latency requirement required by the data type of the Rel-15 mode 3 UE is low, the BS instructs the Rel-15 mode 3 UE to use the shared resource pool as a sensing basis can do.

In some embodiments, steps 2201 to 2209 can be handled in the same manner as steps 1901 to 1909 in Fig.

In step 2211, the BS may determine whether to apply the dedicated resource allocation mode or the sensing-based resource selection mode to the MS that has transmitted the side link BSR.

In some embodiments, if the base station determines that there are not many dedicated schedulable resources, it can ascertain the priority of transmission of data through the PPPP (e.g., LCG ID) of the side link BSR sent by the terminal B. For example, PPPP may be denoted by an index of 1 to 8, with a lower number being a higher priority. When the PPPP of the packet to be transmitted by the terminal B is 5 or more, the base station can determine to operate in the shared pool based on the sensing to the terminal B.

In step 2213, the base station can instruct the terminal B to select and use the shared pool resource based on the sensing basis.

In some embodiments, the indication information may be communicated in a dedicated RRC message (RRC reconfiguration message).

For example, if SensingOperation-r15 is set to TRUE, then it can be instructed to select a sensing-based resource for the shared pool. If SensingOperation-r15 is set to FALSE, the base station may allocate dedicated resources among the shared pool resources or non-shared pool resources as a response to the side link BSR of the UE to the UE .

The terminal B can set SensingOperation-r15 to a default value (= false) when the data transmission is completed through the selected resource on the sensing basis for the shared pool (for example, when there is no more buffered data).

Referring to FIG. 23, FIG. 23 illustrates setting information about a resource for performing CBR measurement in the UE when the UE performs sensing and CBR measurement operations for some shared resource pools.

In some embodiments, the CBR measurement operation of the LTE-V2X (rel-14) terminal can be applied to the entire Tx resource pool (frequency reference) and the Tx resource pool full interval from n-1000 to n-1 .

In some embodiments, some of the shared resource location information of FIG. 17 or FIG. 18 may be shared-resource information from the base station to the terminal, or may be pre-configured in advance within the terminal.

In some embodiments, the terminal may obtain the resource location information of some shared resources using the shared resource information.

In some embodiments, in various embodiments of the present disclosure, the UE may perform CBR measurement operations using at least one of some shared resource pool information, startRB_shared_subchannel and endRB_shared_subchannel, if sensing and CBR measurements for some shared resource pools are possible Can be performed. The terminal may set up some of the shared resource pool CBR measurements.

In some embodiments, the terminal may send a CBR result value (e.g., cbr-PSSCH-r15 or cbr-PSCCH-r15) for some shared resource pool measured using the some shared resource pool information to the base station .

The RRC ASN.1 embodiment, which instructs the base station to report the CBR measurement report to some of the shared resource pools, may be defined as follows.

Example 1: When the resource information includes a partly shared pool report ID (see Table 22 below)

Meanwhile, the base station can use the pool ID information when instructing the UE to report the measurement to the resource pool including some shared resource pools. The RRC ASN.1 embodiment in the case of using the pool ID to indicate a measurement report for a resource pool including some shared resource pools may be defined as follows.

If Tx-ResourcePoolMeasList-r14 includes partialPoolReportId-r15, the TxPoolReportIdentity-14 may include information of partialPoolPeportID-r15 (see Table 23 below).

Example 1-1: RRC ASN.1 embodiment for CBR report signaling of the UE of the embodiment 1 (see Table 24 below)

The existing Rel-14 MeasResultCBR can be reused.

The poolIdentity-r14 may indicate an index of some shared resource pool known to the base station and the UE according to the embodiment of the present disclosure.

Embodiment 1-2: RRC ASN.1 embodiment (see Table 25 below) for CBR report signaling of the terminal of embodiment 1

partialPoolIdentity-r15 and cbr-partial-PSSCH-r15 and cbr-partial-PSCCH-r15 may be newly defined.

The partialPoolIdentity-r15 may indicate an index of some shared resource pools known to the base station and the terminal according to the embodiment of the present disclosure.

Embodiment 2: When resource information includes CBR measurement indications of some shared resource pools (see Table 26 below)

By setting partialCBR to True, the base station can instruct the UE to measure and report CBR on some shared resource pools for poolReportID.

Embodiment 2-1: RRC ASN.1 embodiment (see Table 27 below) for CBR report signaling of the terminal of the embodiment 2

The existing LTE MeasResultCBR may be reused to report the CBR results of some shared resource pool resources.

The poolIdentity-r14 may indicate an index of some shared resource pools known to the Node B and the UE according to an embodiment of the present invention.

Embodiment 2-2: RRC ASN.1 embodiment (see Table 28 below) for CBR report signaling of the terminal of the embodiment 2

cbr-partial-PSSCH-r15 and cbr-partial-PSCCH-r15 may be newly defined to report the CBR results of some shared resource pool resources.

Figures 24-26 illustrate resource measurement and reporting operations for a resource pool for resource sharing in accordance with various embodiments of the present disclosure.

In one embodiment of resource measurement for a resource pool for resource sharing according to an embodiment of the present disclosure, a base station can set a resource pool of mode 3 or mode 4 and determine an ID and a resource pool ID for the resource pool Can be assigned. It is a matter of course that the resource pool of mode 4 may include a normal resource pool or a pre-configured resource pool. The Mode 3 or Mode 4 resource pool may be used in a shared or non-shared manner between terminals operating in different modes.

For the preconfigured resource pool, the resource pool ID may be defined separately from the normal mode 3 resource pool or the general mode 4 resource pool ID.

In the embodiment of FIGS. 24 to 26, a mode 4 pool, in particular, a case where a pre-configured resource pool is shared with a mode 3 terminal will be described as an example.

A first scenario for sharing a pool of preconfigured resources according to an embodiment of the present disclosure is as follows.

The preconfigured resource pool can be operated to share some resource units (for example, subchannels). In order to set the resources to be shared among the pre-configured resource pool resources, the base station can receive a measurement report for the entire pool from the terminal or for some resources (e.g., some sub-channels) of the pool. For example, the information to be measured and reported may include the channel occupancy ratio (CR) of the resource or the channel busy ratio (CBR) of the resource.

Figure 25A illustrates an example of sharing a preconfigured resource pool in accordance with various embodiments of the present disclosure.

Referring to FIG. 25A, in order to operate pool sharing in the first scenario, the base station may need resource status information for a preconfigured resource pool. The resource status information may correspond to information on how much of the resource pool is used by the mode 4 UE that is set to use the preconfigured resource pool. According to the resource status information, the base station can set the preconfigured resource pool to be shared by the mode 3 terminal. When the mode 3 terminal and the mode 4 terminal share a preconfigured resource pool, a part of the preconfigured resource pool can be operated independently for the mode 3 terminal and for the mode 4 terminal. The resource status information can be referred to when the resources to be used by the mode 3 terminal to the mode 4 terminal are divided and operated. For the resource status information, the BS may transmit the resource status measurement and report setting information to the mode 3 terminal to the mode 4 terminal, and receive the resource status measurement report from the terminal. According to the first scenario, the resource status measurement and reporting may be performed for some resource areas (sub-channels) divided into pre-configured resource pools and Mode 3 applications, some resource areas (e.g., sub-channels) Can be applied. The base station may adjust the ratio of the mode 3 application resource area and the mode 4 application resource area by referring to the measurement report (for example, CR or CBR) of the resource area for each mode (for example, subchannel) . Thus, the congestion of mode 3 and mode 4 terminals sharing the same pool can be adaptively adjusted. In the example of the first scenario, the mode 3 application and the mode 4 application resource are shown to be operated in succession, but it is needless to say that the mode 3 application and the mode 4 application resource can be divided and operated discretely within the same pool. A resource ID and a measurement ID may be separately operated for each of the mode 3 application and the mode 4 application resource, and the resource ID and the measurement ID may be used when the terminal performs the measurement report on the resource.

Preconfigured resource pools can be shared for a period of time. The base station may receive a measurement report to set a time to share preconfigured resource pool resources. For example, the information to be measured and reported may include the channel occupancy ratio (CR) of the resource or the channel busy ratio (CBR) of the resource.

Figure 25B illustrates an example of sharing a preconfigured resource pool in accordance with various embodiments of the present disclosure.

Referring to FIG. 25B, in order to use a resource pool preconfigured in the second scenario to be shared by the mode 3 terminal and the mode 4 UE, the BS can refer to the resource status information for the resource pool. The resource status information may correspond to information on how much of the resource pool is used by the mode 4 UE that is set to use the preconfigured resource pool. According to the resource status information, the base station can set the preconfigured resource pool to be shared by the mode 3 terminal. When the mode 3 terminal and the mode 4 terminal share a preconfigured resource pool, a part of the preconfigured resource pool can be operated independently for the mode 3 terminal and for the mode 4 terminal.

The resource status information for the resource pool is reported based on the resource configuration and the measurement report setting information indicated by the BS, and the MS reports the status of the resource (e.g., CR or CBR) Can be grasped. Based on the resource status information for the resource pool, the base station can determine the mode 3 and mode 4 share and mode resource ratio for the preconfigured resource pool. In the second scenario, it is assumed that resource status reporting is performed on a resource pool unit that is configured in advance. The base station can grasp the resource status information of the pool, but it is difficult to grasp the resource status information of the resource zone (for example, a subchannel) used for the mode 3 application or the mode 4 application. The resource sharing time and the resource non-sharing time can be divided and operated for the pool in order to grasp the state of the mode 4 that is to use the pre-configured resource pool. That is, if it is determined that the pool is not congested as a result of measurement by the UE in the resource non-sharing time, the base station can operate the resource area for the mode 3 application by extending it. If it is determined that the pool is congested as a result of measurement by the UE in the resource non-sharing time, the base station can reduce the resource area for mode 3 use or stop resource sharing. When the pool is operated as a shared resource, the resource sharing time and the resource non-sharing time can be periodically operated and can be indicated by the base station. Mode 3 Application to operate measurement report in the second scenario Mode of use or mode 4 Usage It is not necessary to divide the resource area into separate IDs and it can be operated based on the pool ID. In the example of the second scenario, although the mode 3 application and the mode 4 application resource are shown as being operated in succession, it is needless to say that the mode 3 application and the mode 4 application resource can be operated in a discontinuous manner in the same pool.

Although the resource pool described above has been described as an example, the present invention can also be applied to a case where a mode 3 regular pool or a mode 4 general pool is used as a shared resource pool.

24 illustrates signaling for resource measurement and reporting for a resource pool for resource sharing in accordance with various embodiments of the present disclosure. FIG. 24 illustrates signal exchange between the terminal 120 and the base station 110.

Referring to FIG. 24, in step 2401, the BS may transmit measurement setup information on the resource pool to the MS. The terminal may be a mode 3 terminal to a mode 4 terminal. The measurement setup information for the resource pool may be indicated through RRC dedicated signaling or SIB21 signaling. The measurement setup information for the resource pool may include at least one of resource pool information, resource pool information to be measured, or measurement report setting information. According to an embodiment of the present disclosure, the information may include measurement configuration information for a preconfigured pool of resources.

In step 2401, one embodiment including the pre-configured resource pool information is as follows.

In some embodiments, an embodiment of the resource configuration of the pre-configured resource pool among the information included in the measurement setting information for the resource pool includes sizeSubchannel, numSubchannel, startRB-Subchannel, startRB-PSCCH-Pool And a preConfigpoolReportId indicating the ID of the resource pool.

In some embodiments, information about the entire resource pool may be set as shown in Table 29 below. The pool-sharing-timer information may be used to periodically perform resource sharing and non-shared resource management as in the second scenario.

In some embodiments, information for some of the resource pools may be set as shown in Table 30 below. The following is the resource information for one area. It is possible to set the following information for several areas (for example, mode 3 application and mode 4 application). The pool-sharing-timer information may be used to periodically perform resource sharing and non-shared resource management as in the second scenario.

In some embodiments, the measurement configuration of the information contained in the measurement setup information for the resource pool includes a pool ID (e.g., SL-V2X-PreConfg-TxPoolReportId) for indicating a pre- (See Table 31 below). The pool ID may be a pool ID corresponding to a certain resource area in each mode or a pool ID corresponding to the entire resource pool. The pool ID operation corresponding to a certain resource area per mode can be used in the first scenario. Pool ID operations corresponding to the entire resource pool can be used in the second scenario.

In some embodiments, the report configuration of the information contained in the measurement configuration information for the resource pool includes information indicating conditions (e.g., events or periodicals) for transmitting measurement results (See Table 32 below).

In step 2403, the UE acquires the pool ID information of the resource configuration included in the information and the pool ID that is required to be measured in the measurement configuration, And perform resource state measurement on the indicated resource pool. According to embodiments of the present disclosure, a resource state measurement may be performed on the entire shared resource pool or a resource state measurement may be performed on some resource regions of the pool. The resource state measurement value may correspond to CR to CBR.

In step 2405, if the condition for transmitting the measurement result included in the measurement setting information for the resource pool is satisfied (e.g., the CBR measurement result is higher or lower than the threshold) A measurement report can be sent. The UE may periodically transmit the measurement results included in the measurement setup information for the resource pool.

One embodiment of the measurement report transmitted by the UE is as follows. In one embodiment, the terminal may report resource status results (e.g., CBR results) of the resource pool via MeasResultCBR. In another embodiment, when a measurement result for a preconfigured resource pool is separately defined, the UE can transmit it through PreconfigMeasResultCBR.

The poolIdentity information indicated in the measurement result may be a pool ID indicating a partial pool area of the first scenario or a pool ID indicating an entire pool area of the second scenario according to the embodiment of the present disclosure.

26 illustrates the operation of a base station for processing resource status reports required for shared resource pool operations in accordance with various embodiments of the present disclosure. FIG. 26 illustrates the operation of the base station 110. FIG.

Referring to FIG. 26, in step 2601, the BS transmits setting information for resource pools to be shared and resource status measurement and reporting information, and receives measurement reports on the set resource pools from the MS. The setting information may be transmitted through an RRC dedicated signal or an SIB signal. The configuration information may include measurement setup information for the resource pool of FIG. 24 according to an embodiment of the present disclosure. The base station can receive the resource status measurement result from the terminals in the cell or from a specific terminal (the terminal that the base station has instructed measurement of the shared resource pool). The resource state measurement value may be represented by CR to CBR. The resource status measurement may be passed to the measurement report for the resource pool of FIG. The base station may receive the resource status measurement values for some resource areas of each mode according to the first scenario. The base station may receive the resource status measurements for the pool as a whole according to the second scenario.

In step 2603, the BS can determine whether to allow the resource pool to be shared between the mode 3 terminal and the mode 4 terminal based on the resource status information of the resource pool received from the terminal. The resource pool may be a resource pool that is already shared between the mode 3 terminal and the mode 4 terminal, or may be a resource pool to be shared.

Whether or not to allow the BS to share the resource pool between the mode 3 terminal and the mode 4 terminal is determined in step 2601 by comparing the resource state measurement values of the resource pool and the mode 3 resource area or the mode 4 resource area received from the terminals For example, CR or CBR results).

For example, according to the first scenario, if a CBR result of a resource area being used by a mode 4 UE is higher than a specific threshold value for a specific resource pool, the BS may not reduce or allocate a resource region to be shared and used by the mode 3 UE . According to the first scenario, if the CBR result of the resource area being used by the mode 4 UE is lower than a specific threshold value for the specific resource pool, the BS can increase the resource area shared and used by the mode 3 UE. According to the first scenario, if the CBR result of the resource area being used by the mode 3 UE is higher than a specific threshold value for the specific resource pool, the BS may not reduce or allocate the resource region to be shared and used by the mode 4 UE. According to the first scenario, if the CBR result of the resource area being used by the mode 3 UE is lower than a specific threshold value for a specific resource pool, the BS can increase the resource area shared and used by the mode 4 UE.

In another example, if the CBR result is higher than a certain threshold value for a specific shared resource pool according to the second scenario, the BS may reduce the resource area to be used by the mode 3 UE or may not allow the shared use in the next resource sharing period. According to the second scenario, if the CBR result for a specific shared resource pool is lower than a certain threshold value, the base station can increase the resource area to be used by the mode 3 UE or allow sharing use in the next resource sharing cycle. According to the second scenario, if the CBR result for a specific shared resource pool is higher than a certain threshold value, the mode 4 terminal may reduce the resource area to be used or may not allow sharing use in the next resource sharing period. According to the second scenario, if the CBR result for a specific shared resource pool is lower than a certain threshold value, the mode 4 terminal can increase the resource area to be used or allow sharing use in the next resource sharing period.

For example, the base station may determine the CBR results (e.g., CBR_Mode3_A or CBR_Mode3_B) of the resource pool in mode 3, the CBR results (e.g., CBR_Mode4_A or CBR_Mode4_B) of the resource pool in mode 4, CBR_PreConfig_A or CBR_PreConfig_B).

In one embodiment, if at least one of CBR_PreConfig_A or CBR_PreConfig_B has a CBR value that is lower than a preconfigured resource pool mode 3 resource pool or a mode 4 resource pool or a mode 3 resource pool and a mode 4 resource pool, a preconfigured resource Pool is available as a shared resource pool.

If the base station determines to use a specific resource pool as a shared resource pool according to the determination in step 2603, the base station can set resources for sharing and using the resource pool in step 2605.

For example, assuming that the pre-configuration Tx resource pool is composed of 8 pre-configuration Tx resource pools, the CBR value of the base station may be smaller than a specific CBR threshold value (e.g., a CBR reference value for determining a shared resource pool) A small resource pool can be allocated to the resource pool for mode 3. If there is more than one resource pool with a smaller CBR value, the CBR value may be assigned in the order of lower or resource pool for mode 3 by selecting an arbitrary pool.

For example, if the CBR value of the resource pool is smaller than a specific CBR threshold (e.g., a CBR reference value for determining a shared resource pool) Resource pools can be assigned to resource pools for mode 3 and mode 4 shares.

Assuming that the Pre-Configuration Tx Resource Pool is composed of 8, a resource pool having a CBR smaller than a specific CBR threshold (e.g., a CBR reference value for determining a shared resource pool) among resource pools does not exist The base station can select the resource pool having the lowest CBR as the shared resource pool of the mode 3 terminal and the mode 4 terminal.

When the base station determines the shared resource pool and the resource area through the method in step 2605, the base station transmits the shared resource pool and shared resource area information (Pool location, Pool Id, etc.), measurement setting information, report setting information, To the terminal to be used. The BS may transmit a shared resource use period or an effective time according to the second scenario. When the shared use of the specific pool is released according to the shared resource use period or the valid time, the setting of the specific pool may be set to an initial set value at the time of non-shared resource.

In step 2607, the base station may transmit the pool ID of the resource area of the resource pool to the mode 3 terminal to the mode 4 terminal according to the first scenario.

If the base station determines not to use a particular resource pool as a shared resource, it sets up the existing resource pool information and maintains the existing resource pool information in step 2609.

When the UE receives the resource pool sharing validity time (or the resource sharing period) according to the base station operation in step 2607 of FIG. 26 with respect to the second scenario, the shared resource pool can be used during the resource pool sharing valid time.

The base station can perform the operation of FIG. 26 continuously or periodically or according to the resource status information for a specific pool.

Methods according to the claims of the present disclosure or the embodiments described in the specification may be implemented in hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored on a computer-readable storage medium are configured for execution by one or more processors in an electronic device. The one or more programs include instructions that cause the electronic device to perform the methods in accordance with the embodiments of the present disclosure or the claims of the present disclosure.

Such programs (software modules, software) may be stored in a computer readable medium such as a random access memory, a non-volatile memory including flash memory, a read only memory (ROM), an electrically erasable programmable ROM but are not limited to, electrically erasable programmable read only memory (EEPROM), magnetic disc storage device, compact disc-ROM (CD-ROM), digital versatile discs An optical storage device, or a magnetic cassette. Or a combination of some or all of these. In addition, a plurality of constituent memories may be included.

The program may also be stored on a communication network, such as the Internet, an Intranet, a local area network (LAN), a wide area network (WAN), a communication network such as a storage area network (SAN) And can be stored in an attachable storage device that can be accessed. Such a storage device may be connected to an apparatus performing an embodiment of the present disclosure via an external port. Further, a separate storage device on the communication network may be connected to an apparatus performing the embodiments of the present disclosure.

In the specific embodiments of the present disclosure described above, the elements included in the disclosure have been expressed singular or plural, in accordance with the specific embodiments shown. It should be understood, however, that the singular or plural representations are selected appropriately according to the situations presented for the convenience of description, and the present disclosure is not limited to the singular or plural constituent elements, And may be composed of a plurality of elements even if they are expressed.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present disclosure should not be limited to the embodiments described, but should be determined by the scope of the appended claims, as well as the appended claims.

Claims

A method of operating a terminal in a wireless communication system,

Receiving a message including information on a resource pool for vehicle communication from a base station and information for selecting a resource in the resource pool;

Determining candidate resources in the resource pool based on information for selecting the resource;

And transmitting data using at least one resource among the candidate resources.
The method according to claim 1,

Wherein the information for selecting the resource includes information relating to one of boundary values of a time interval including at least one candidate resource in the resource pool.
The method of claim 2,

Wherein one of the boundary values is selected by the terminal to achieve a latency requirement of the data transmission.
The method according to claim 1,

Selecting a different resource to transmit next data if a value randomly generated by the terminal is greater than a probability of the terminal maintaining the at least one resource;

Further comprising the step of determining to maintain the at least one resource to transmit next data if a value randomly generated by the terminal is less than a probability that the terminal will retain the at least one resource.
The method according to claim 1,

Transmitting a message including at least one of a traffic pattern information and a transmission delay limit report to the base station.
The method according to claim 1,

And transmitting a message including a channel busy ratio (CBR) report to the base station.
A method of operating a base station in a wireless communication system,

And transmitting a message including information on a resource pool for vehicle communication and information for selecting a resource in the resource pool to the terminal,

Wherein candidate resources in the resource pool are determined by the terminal based on information for selecting the resource,

Wherein the data is transmitted by the terminal using at least one resource among the candidate resources.
The method of claim 7,

Wherein the information for selecting the resource includes information relating to one of boundary values of a time interval including at least one candidate resource in the resource pool.
The method of claim 8,

Wherein one of the boundary values is selected by the terminal to achieve a latency requirement of the data transmission.
The method of claim 7,

Receiving a message from the terminal, the message including at least one of traffic pattern information and a transmission delay limit report.
The method of claim 7,

And receiving a message including a channel busy ratio (CBR) report from the terminal.
An apparatus of a terminal in a wireless communication system,

A transmission / reception unit; And

And at least one processor operatively coupled to the transceiver,

Wherein the transceiver receives a message including information on a resource pool for vehicle communication from the base station and information for selecting a resource from the resource pool,

Wherein the at least one processor is configured to determine candidate resources in the resource pool based on information for selecting the resource,

And the transceiver transmits data using at least one of the candidate resources.
The method of claim 12,

Wherein the information for selecting the resource comprises information relating to one of boundary values of a time interval including at least one candidate resource in the resource pool.
An apparatus of a base station in a wireless communication system,

A transmission / reception unit; And

And at least one processor operatively coupled to the transceiver,

The transceiver transmits a message including information on a resource pool for vehicle communication and information for selecting a resource in the resource pool to the terminal,

Wherein candidate resources in the resource pool are determined by the terminal based on information for selecting the resource,

Wherein the data is transmitted by the terminal using at least one of the candidate resources.
15. The method of claim 14,

Wherein the information for selecting the resource comprises information relating to one of boundary values of a time interval including at least one candidate resource in the resource pool.